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Parallels International GmbH
Patches for Parallels Remote Application Server
Windows
15 patches available
Parallels RAS is a comprehensive application delivery and desktop virtualization solution. Organizations can use Parallels RAS to deliver virtual applications and desktops remotely.
Parallels Remote Application Server Version 20.2.25997
Release Date
6/19/2025
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core v20.2.1-25997 (19 June 2025)$$$New: Parallels Client for macOS now supports sending keyboard input and events from remote applications to the active local application on your Mac.$$$New: Added support for FSLogix version v25.04 and dropped support for v2210_HF_02.$$$New: Added PAP (UTF-8) and CHAP (UTF-8) password encoding support for RADIUS MFA login with passwords containing characters like Umlauts (ä; ö; ü) and the section sign (§).$$$Improved: Updated the disconnect reason displayed in Session Information for disconnections caused by network instability to “Network error”.$$$Improved: Creating an AVD template without an availability set was logging errors for some optional settings.$$$Improved: Added new and improved log messages upon sessions logoff or disconnection.$$$Improved: Added a warning in the RAS Console when switching a host pool to use only the primary datastore; alerting administrators that hosts in non-primary datastores will be deleted.$$$Improved: Improved error logs on the connection broker when SAML authentication fails.$$$Critical Fix: Hosts were being erroneously deleted from the wrong host pool due to ID conflicts across VDI; RDSH; and AVD host pools.$$$Fixed: Templated hosts created within a host pool with autoscaling disabled are allowed to be recreated in the Show Hosts dialog.$$$Fixed: Hosts do not clone if distribution fails in one or more datastores.$$$Fixed: Administrators were unable to promote a Secondary Connection Broker to Primary when the Primary was down in a Tenant Broker. This fix ensures that administrators can now perform the promotion both from the RAS Console and via PowerShell.$$$Fixed: Hyper-V template distribution could fail if different providers were assigned to separate RAS provider services. This fix ensures that replicas are correctly migrated between providers; and the Console accurately reflects the template distribution status as OK for both providers.$$$Fixed: Changing the keep available buffer in the provision tab of host pools did not result in an immediate change after applying.$$$Fixed: Recreation of powered off; suspended; or powered on Hosts did not start on VDI when applying settings.$$$Fixed: A VDI template synchronization issue between the hypervisor and RAS that caused certain hosts to be created on the Nutanix but not visible on the RAS Console.$$$Fixed: Templates stuck in creating versions can now be reset upon Connection Broker restart.$$$Fixed: Selected columns in Sessions tab on the RAS Console did not persist after restarting or logging back in.$$$Fixed: Windows 11 and Windows Server 2025 now correctly report the OS major version as 10 instead of 11.$$$Fixed: Users could receive The remote computer is already in use error when the client disconnected and the Connection Broker canceled host preparation.$$$Fixed: The replica VM was powered on after cloning; preventing it from being converted to a template.$$$Fixed: Certain applications in remote sessions could become unresponsive when saving a PDF to a redirected drive using the Windows Parallels Client.$$$Fixed: ‘Invalid Organizational unit or Domain settings.’ error message was being shown in RAS Console when selecting an OU while adding an RDSH Template.$$$Fixed: Hosts located in a datastore were not deleted when the datastore was deselected from a host pool.$$$Fixed: Retrying template distribution to a datastore that became inaccessible mid-process now succeeds on the first retry after access is restored; instead of requiring two retries.$$$Fixed: Scheduled agent auto-upgrades did not start after upgrading RAS Core in environments with a single Connection Broker.$$$Fixed: Scanner Rename Pattern changes in Universal Scanning were not being applied.$$$Fixed: WIA scanner redirection did not work on Windows Server 2025.$$$Fixed: Improved handling of overlapping seamless windows with z-order support; reducing flickering when windows appear or disappear.
Parallels Remote Application Server Version 20.2.25893
Release Date
4/14/2025
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core v20.2.0-25893 (14 April 2025)$$$Fixed: A memory leak can occur in the Connection Broker when the system fails to release icon memory properly.
Parallels Remote Application Server Version 20.2.25893
Release Date
4/14/2025
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core v20.2.0-25893 (14 April 2025)$$$Fixed: A memory leak can occur in the Connection Broker when the system fails to release icon memory properly.
Parallels Remote Application Server Version 20.2.25891
Release Date
3/27/2025
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core$$$Parallels RAS Core v20.2.0.1-25891 (27 March 2025)$$$Fixed: HTTP to HTTPs redirection behavior caused issues with User Portal client detection or SSL offloading when using HALB or third-party load balancers.
Parallels Remote Application Server Version 20.2.25889
Release Date
3/4/2025
Bug Fix?
Yes
Minor Release?
Yes
Patch Notes

Parallels RAS Core v20.2-25889 (4 March 2025)$$$New: Support for Windows Server 2025 infrastructure components (excluding Hyper-V).$$$New: Ability to choose the datastore for VMware VM deployments.$$$New: Scanner redirection for 64-bit applications.$$$New: Administrators can now define up to two separate maintenance windows in AVD host pools for critical components; including the AVD agent; the side-by-side stack; and the Geneva Monitoring.$$$New: Added a repair option to redeploy AVD agents when the AVD host status is “Host unavailable” or “SxS stack unknown”.$$$New: Added support for the Web+Credentials authentication mode for User Portal.$$$New: Ability to change the account group for group users.$$$New: Added support for dynamic display resizing for User Portal.$$$New: Z-order support for published applications is added as an experimental feature.$$$Improved: Increased the character limit of the “Public domain addresses” field of the Tenant properties.$$$Improved: The triggering of the printer cache frequency is reduced to once every thirty days.$$$Improved: Ability to suppress the warning message about the name pattern limiting the number of available host names in an RDSH host pool.$$$Improved: Tenant name validation in the Tenant console.$$$Improved: Warning in a Secure Gateway when no certificates are available.$$$Improved: The performance of the “Sessions” tab.$$$Improved: When the static assignment is enabled; the user can launch two persistent desktops from one template in two host pools.$$$Improved: Removed the option to enable verbose logging without a time limit.$$$Improved: Introduced a preferred Enrollment Server for each SAML connection based on the username and the number of Enrollment Servers configured.$$$Improved: Removed deprecated AVD Microsoft Rest APIs.$$$Fixed: Incorrect description was shown when the creation of hosts in an AVD host pool failed or when a host was deleted.$$$Fixed: An administrator could not change the sign-in control on a templated RDSH host even though no GPO was applied.$$$Fixed: The application name was not updating on the “Alternate URL” page if an administrator returned to the previous wizard page and changed the application name.$$$Fixed: Printer change notifications occurred every 30 seconds after collecting data.$$$Fixed: The Connection Broker could crash in specific scenarios when syncing session information with the reporting engine.$$$Fixed: The Tenant name was missing in email notifications.$$$Fixed: After restarting a Secure Gateway; User Portal was inaccessible when using a custom background image.$$$Fixed: When users started connecting to a RAS Farm; unexpected additional hosts were created in the AVD host pool.$$$Fixed: The administrators were not allowed to add hosts using the same template for different host pools even though the host pool host limit was not reached.$$$Fixed: An error message was shown when a user tried to change his domain password; and it did not comply with the password policy rules.$$$Fixed: A Connection Broker could become unresponsive when opening the Management Portal.$$$Fixed: The versioning page in the wizard to create a template with Hyper-V multi-provider distribution was removed.$$$Fixed: In some cases; the RAS Agent could not correctly detect Windows on Windows 64 (WoW64).$$$Fixed: Scheduled tasks for agents and host pools were not completed in specific scenarios.$$$Fixed: Orphaned hosts from a host pool could not be removed or recreated.$$$Fixed: When resizing the “Template Hosts List” dialog in the RAS Console; the buttons were incorrectly positioned and overlapping with the list.$$$Fixed: Users could not start a remote desktop session when the VDI hosts were powered off.$$$Fixed: Creating hosts from a template using Sysprep failed when the username included the domain.$$$Fixed: When the profile settings were set to “Do not manage by RAS;” FSLogix was switched off.$$$Fixed: AutoUpgrade was attempted on the template VM.$$$Fixed: Multi-Factor Authentication (MFA) restriction
Parallels Remote Application Server Version 20.1.25634
Release Date
12/20/2024
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core v20.1.0.1-25634 (20 December 2024)$$$Fixed: A black screen appeared when users opened an RDP session to a host with Windows Enterprise Edition and RAS Guest Agent installed.
Parallels Remote Application Server Version 19.4.25228
Release Date
11/1/2024
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core$$$Parallels RAS Core v19.4.3.2-25228 (1 November 2024)$$$Fixed: Improved security when setting up an SSL configuration.
Parallels Remote Application Server Version 20.0.25389
Release Date
10/30/2024
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core$$$Parallels RAS Core v19.4.3.2-25228 (1 November 2024)$$$Fixed: Improved security when setting up an SSL configuration.
Parallels Remote Application Server Version 19.4.25226
Release Date
10/18/2024
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core v19.4.3.1-25226 (18 October 2024)$$$Fixed: Certificate enrollment for users starts failing after some time.
Parallels Remote Application Server Version 19.4.25221
Release Date
9/12/2024
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core$$$Parallels RAS Core v19.4.3-25221 (12 September 2024)$$$Fixed: AVD hosts failed to join host pools in certain situations.$$$Fixed: Losing connection to VDI hosts created from a template after a few days.$$$Fixed: The “Create Parallels Template” wizard showed incorrect hosts if nested pools had the same names in vCenter.$$$Fixed: A sub-menu of a specific application could not be accessed.$$$Fixed: A pop-up window of a specific application was not visible in RemoteApp mode.$$$Fixed: HTTP requests to the Tenant Broker APIs were not working.$$$Fixed: Guest VMs were in the “Not verified” state after Windows updates.$$$Fixed: When adding RDSH hosts to the host pool manually; the FQDN was not set.
Parallels Remote Application Server Version 19.4.25177
Release Date
9/4/2024
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core v19.4.2.1-25177 (4 September 2024)$$$Fixed: When two or more AVD hosts are created simultaneously; only one is added to the Host Pool.
Parallels Remote Application Server Version 19.4.25171
Release Date
8/6/2024
Bug Fix?
Yes
Minor Release?
Yes
Patch Notes

Parallels RAS Core v19.4.2-25171 (6 August 2024)$$$Security Fix: Upgraded to OpenSSL 3.0.13 / FIPS 3.0.9. $$$Security Fix: Upgraded to .NET 6.0.131.$$$New: Added the ability to suppress the prompt to update Agents on startup.. $$$New: Added the ability to automatically connect to an alternative Connection Broker.$$$New: The “Automatic log out idle client connection” option is now enabled on Tenant Brokers when users log in to User Portal. The value can be viewed in the Tenant properties. $$$New: Added a new authentication type “Web + Credentials”; where users use web authentication to list the published items and credentials to launch them. This authentication type is supported only in Parallels Client for Windows 19.4.2 at the time of the release.$$$New: Added the option to control the information shown when a user using a TOTP or an email OTP MFA provider is not enrolled. $$$New: Added the ability to set a custom User Portal background image.$$$New: Added the ability to restrict clipboard data to text-only using new policy settings.$$$New: Added the ability to redirect drives as read-only using new policy settings.$$$Improved: Added the ability to change Site properties on the Site page.$$$Improved: Added a status icon for the RDSH host pool members page.$$$Improved: Added support for control commands like “Drain”; and “Drain & Reboot” for template-based RDSH hosts in a host pool not configured for autoscaling.$$$Improved: In the “Site” category; the “Machine ID” column is now available.$$$Improved: Improved log messages when converting a template to a VM; especially on failures.$$$Improved: Deleting a templated host pool after creating it; without applying settings; would result in invalid log messages: “Failed to find AVD host pool hostpool runtime object with ID 3. Ignoring host creation requests from the AVD hostpool.”$$$Improved: Several RDSH hosts created from one linked clone template report have the same usage for CPU and RAM counters.$$$Improved: Enrollment server does not require a restart of the service if the username is changed.$$$Improved: Added missing timestamps to events sent to the reporting service.$$$Improved: Added support for separate monitoring permissions for Power Administrators.$$$Improved: Improved log information.$$$Improved: If a license is updated on the same date it expires; the product still reports that the license expired.$$$Improved: Server-triggered client error messages related to disconnections.$$$Improved: Added registry settings to the controller for the synchronizing timeouts between Connection Brokers in the same Site. For more information; see this KB article: https://kb.parallels.com/en/130213.$$$Critical Fix: Universal Printing might fail to use some of the embedded fonts when using the EMF format.$$$Fixed: Possible crash in the Enrollment Service.$$$Fixed: When recreating a templated RD Session Host; the updated template version is not visible from the “RD Session Hosts” > “Hosts” section in RAS Console. The actual (updated) template version can be viewed from “RD Session Hosts” > “Templates” > “Show hosts”.$$$Fixed: Secure Gateway session and Tenant session columns expand over other columns.$$$Fixed: The “Manage Parallels RAS Farm Connections“ dialog might lose information if new Connection Brokers are added.$$$Fixed: The License expiry status notification message is not removed after the product is activated.$$$Fixed: Improved validation of tenant invitation emails. $$$Fixed: Downloading files for IDP or the new version might fail.$$$Fixed: Navigating to the “Start” category does not unlock locked objects.$$$Fixed: Changing the log level from the “Global Logging” page will not switch the state immediately if some hosts are not reachable.$$$Fixed: RAS Console may crash if a large number of operations are triggered on cloned hosts.$$$Fixed: Invite email content does not encode correctly.$$$Fixed: AVD resources disappear when switching sites.$$$Fixed: Improved stability when promoting a Licensing Site without activ
Parallels Remote Application Server Version 19.4.25061
Release Date
7/4/2024
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core v19.4.1.1-25061 (4 July 2024)$$$Fixed: Instability when creating or recreating hosts from a template. Some hosts may disappear from the RAS Console; and some hosts cannot be recreated.$$$Fixed: Using API to delete a RAS provider may crash the VDI Agent service.$$$Fixed: When using Print to PDF in Universal Printing with documents that have pages with different orientations; margins can be cropped.
Parallels Remote Application Server Version 19.4.24962
Release Date
5/2/2024
Bug Fix?
Yes
Minor Release?
No
Patch Notes

Parallels RAS Core$$$Parallels RAS Core v19.4-24962 (2 May 2024)$$$New: Session Host Agent auto-upgrade.$$$New: Support for SC//HyperCore version 9.2.$$$New: Ability to enable HTTP host header attacks protection.$$$New: Tunnelling policies can be enabled if the <Default> Theme is used and either the “Allow gateway tunneling connections” setting is set or the Secure Gateway or Parallels Client IP is excluded from MFA on the “Restrictions” tab.$$$New: Email OTP MFA provider.$$$New: Added an option to opt-in to Client Experience Program to the installer.$$$New: Allow view of Licensing information permission for power and custom administrators.$$$New: Allow session management based on AD group membership permission for custom administrators.$$$New: Added the “Overwrite support actions with the following URL” option.$$$New: Template versioning support for the Nutanix provider.$$$New: Add applied policy information to the session information page and details window.$$$New: Allows the administrator to clear user preferences from the Device Manager category. This will remove “Favorites” for all clients; EULA selection; and CEP Opt-In for User Portal.$$$Improved: Universal printing performance by caching font information. $$$Improved: Theme access settings and the URL can be easily viewed in the Theme’s general settings.$$$Improved: Enrollment Agent template and smartcard logon certificate template can use a key size higher than 2048.$$$Improved: Added Web Authentication to Standard Client Feature Set.$$$Improved: Allowed an administrator to provide instruction prompts to users when they are asked for TOTP or Radius OTP.$$$Improved: Template versioning is shown in a hierarchy tree structure. $$$Improved: VDI Host pool status is shown where applicable.$$$Improved: Template and version used for the host are shown.$$$Improved: Alignment of control for the file transfer window.$$$Improved: Ensure that the proper license information is provided to the user according to the settings and permissions.$$$Improved: The number of archived log files can be set to more than five.$$$Improved: Ability to drag the application to another monitor when maximized (requires Windows Registry setting WinArrangement). $$$Improved: Ability to validate UPN credentials format for a Remote PC provider (static).$$$Improved: Virtual machines are now shown as “Not available” if they are deleted from a hypervisor.$$$Improved: Ability to import a certificate with the same fingerprint.$$$Improved: Ability to change the initial time for Windows performance counters. $$$Improved: Reduced the number of less informative logs. $$$Improved: Universal Scanning support for “PaperStream Capture” and “PaperStream Clickscan” applications with Fujitsu scanners. $$$Improved: Security when retrieving Secure Gateway logs.$$$Improved: Forbid installation or attempts to start the file redirection cache driver on x86 operating systems.$$$Improved: VDI Agent stability.$$$Improved: Better recovery if communication with the Nutanix provider fails.$$$Improved: Bulk deleting of hosts on the Nutanix provider might log multiple “Failed to get information about VM” warnings.$$$Improved: Synchronization of Site settings is faster when changing Site defaults.$$$Improved: Clearly show if we use Hardware ID or MAC address in RAS Console.$$$Improved: Allows multiple providers with the same name.$$$Improved: Added validation in both the Theme properties and the “Connection” and “Authentication” categories.$$$Improved: Improved warning when Secure Gateway uses TLS 1.3 only.$$$Improved: Added a “Test” button wherever a URL is entered to validate it.$$$Improved: Added warning prompts when generating Tenants keys.$$$Improved: Changed the text of the button or link to open the “Properties” window from “Change” to “View” when properties are read-only; .$$$Improved: Warning message related to template name patterns.$$$Improved: If the IP of an RDSH host created from a templated host changes; the direct address is updated automatically.$$$Impr
Parallels Remote Application Server Version 19.3.24624
Release Date
3/13/2024
Bug Fix?
No
Minor Release?
Yes
Patch Notes

Parallels RAS Core$$$Parallels RAS Core v19.3.1.2-24624 (13 March 2024) $$$Improved: Web authentication lookup for accounts now uses the Theme domain if configured.
Parallels Remote Application Server Version 19.3.24619
Release Date
12/12/2023
Bug Fix?
Yes
Minor Release?
Yes
Patch Notes

Parallels RAS Core$$$Parallels RAS Core v19.3.1-24619 (12 December 2023) $$$New: Administrators can now allow users to force a logoff their session$$$Improved: Allow cloning and recreation from a template while it is in the needs update status for the AVD provider.$$$Improved: Ability to configure the request/response timeout for a public key from Enrollment Agent.$$$Fixed: RAS Console: Fixed column sorting for numeric columns represented in text form (time values; bandwidth; etc.).$$$Fixed: RAS Console: Added a checkbox to enable and disable Quick Keypads and Certificates in their respective properties window.$$$Fixed: RAS Console: Validation fails when publishing Unlimited concurrent user license settings for non-English languages.$$$Fixed: RAS Console: Removed suggestion to disable host pools after exiting maintenance mode for an RDSH template.$$$Fixed: RAS Console: The delete option is always available for template versions.$$$Fixed: RAS Console: The administrator may not be warned about some unassigned hosts after a RAS upgrade.$$$Fixed: RAS Console: Template information may not be shown while removing a template from a host pool.$$$Fixed: After an upgrade from 19.2.3; all RD session hosts created from a template are in the Not verified state instead of the Needs update state and cannot be recreated or deleted.$$$Fixed: Possible crash when shutting down RAS Agent service.$$$Fixed: RAS Console: Cannot save credentials for proxy settings.$$$Fixed: AVD hosts cannot be created if the template VM has a public IP.$$$Fixed: Failed to delete some guests while bulk deleting on Nutanix provider.$$$Fixed: File redirection cache might provide invalid information which could crash applications (e.g. PowerShell).$$$Fixed: Web authenticated session will continue to loop when locking the workstation.$$$Fixed: A user may fail to connect to a VDI desktop if Parallels Client IP address is changed during the desktop preparation.$$$Fixed: Possible crash when shutting down RAS Connection Broker service.$$$Fixed: AVD host may not join a host pool if it was created to satisfy the Keep available buffer value.$$$Fixed: Failed to install FSLogix 2210 hotfix 2.$$$Fixed: An error could be logged in recreation or removal of a host despite there being none.$$$Fixed: A user may fail to connect to a Remote PC VDI host.$$$Fixed: A host needing an update may switch to an OK state after a schedule finishes running. $$$Fixed: Hosts may not be assigned to pools after an upgrade to RAS 19.3 in a multi-site environment.$$$Fixed: It is not possible to change the state for Universal Printing or Universal Scanning for VDI providers.$$$Fixed: Upgrade from version 19.2.x to version 19.3.0 might result in unusable RDSH templates.
Parallels Remote Application Server Version 19.2.24005
Release Date
7/6/2023
Bug Fix?
Yes
Minor Release?
Yes
Patch Notes

RAS Version 19.2.3 (24005) - 6 July 2023$$$$$$tNew: Administration audit replication across all Connection Brokers can now be enabled or disabled.$$$tNew: AVD Provider can match AD users by using objectGUID as a string.$$$$$$tImproved: Moved logs related to authentication sessions to the extended level.$$$tImproved: If a Connection Broker is not verified; other agents states will be unknown.$$$$$$tFixed: File Cache driver does not install on Windows 7 operating system.$$$tFixed: After pushing a Guest Agent on a new Windows 10 Enterprise VM; RDS Role is not enabled.$$$tFixed: Push installation via the RDSH wizard works only for the first RDSH.$$$tFixed: A template might be deleted after being used in the maintenance mode. $$$tFixed: If a published desktop has a startup application configured; session reconnection might provide the user with a new session.$$$tFixed: If a user starts a desktop session as a member of the administration group; session reconnection might provide the user with a new session.$$$tFixed: If the Enrollment Server is not connected to a Connection Broker; it will leak resources.$$$tFixed: Clones may not be accessible from RAS Client if a template is added to a VDI pool with PowerShell.$$$tFixed: Wildcards in MAC addresses are not handled properly in expression-based filtering.$$$$$$tFor all known issues and resolutions; please see the Parallels KB article https://kb.parallels.com/en/128962 or contact support directly at https://www.parallels.com/eu/products/ras/support/.$$$
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