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Ver: Version: 8.1
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Updated: May 21, 2026 | Applies to version: 8.1

This release sees further beneficial enhancements to the Altium On-Prem Enterprise Server and its related technologies. In addition, numerous fixes have been made to resolve issues raised by customers through the Altium Community.

While the Altium On-Prem Enterprise Server installer includes an automated backup of your existing installation, it is always a good idea to make a pre-update backup of your data yourself – taking a redundancy copy off to one side, as it were. This provides additional safety should any unforeseen technical difficulties arise (see Backing up and Restoring Your Installation). It is advised to test out a new release of Altium On-Prem Enterprise Server on a different machine, before updating your production instance. The use of Virtual Machines can be invaluable in this respect.

In addition, please ensure that you refresh your Altium On-Prem Enterprise Server licensing. From the Admin – Licenses page of the Workspace browser interface, delete the existing Server/CAL licenses and then add fresh instances back in. This will ensure you have the latest licensing, incorporating any licensing-related feature changes.

While connection to the Workspace provided by Altium On-Prem Enterprise Server 8.0 is possible from earlier versions of Altium Designer, users are encouraged to update to the latest version – especially where Workspace enhancements relate to changes to the user interface within Altium Designer.

Altium On-Prem Enterprise Server 8.1.1

Released: 29 May 2026 - Version: 8.1.1 (build 76)

Release Notes for Altium On-Prem Enterprise Server

Enterprise Server Installation Improvements

The following improvements to Enterprise Server installer have been implemented:

  • External base URL support – added configuration for an external base URL that defines how the Enterprise Server is reached from outside the network, enabling correct URL generation for shared links in load balancer and reverse proxy deployments. Use new options on the Altium On-Prem Enterprise Server Configuration page of the Altium On-Prem Enterprise Server Setup wizard to do that.

  • SSL certificate management – you can now configure the SSL certificate for the Enterprise Server instance being installed. A new Select SSL Certificate page of the Altium On-Prem Enterprise Server Setup wizard allows you to select an existing certificate from the Windows certificate store, upload a *.pxf/*.p12 certificate file, or generate a self-signed certificate.

    Also, support for sslCertFile, sslCertPassword, and sslCertThumbprint entries has been added when using the command line to install the Enterprise Server.

  • Removed LDAP port configuration – the LDAP port setting has been removed from the installation wizard, as it is an internal infrastructure concern and not part of end-user setup.

  • Global PreferredProtocol enforcement – PreferredProtocol is now applied globally across the application.

  • Database cleanup and trimming – database cleanup and trimming is now performed during the Enterprise Server update to increase database performance. When using the command line to update the Enterprise Server, the compacting step can be skipped by using the SkipDbCompact parameter.

For more information about installing the Enterprise Server, refer to the Installing the Software page.

Support for Multi-variant Projects in the 'Project with initialise in PLM' Process Workflow

The Project with initialise in PLM project creation process definition (and the underlying workflow) now supports projects from multi-variant project templates to reserve PLM ID numbers for each variant without the need to release and publish the project.

For more information about processes and workflows and PLM integration, refer to the Creating & Managing Processes and PLM Integration pages.

Server-side Design Postprocessing Improvements

Server-side design postprocessing (including preview generation) now runs in parallel without causing concurrency issues. As a result, ARK-related operations have been scaled up based on the server's CPU cores to maximize utilization. Major benefits of this are:

  • Faster post-processing.

  • Smaller queue sizes.

  • More stable environment – major crashes no longer occur while running multiple post-processing operations in parallel.

  • Much better hardware utilization.

The default concurrency settings are updated to take advantage of parallel execution:

  • Parallel execution of ARK processes is ON by default.

  • Number of parallel executors is set to half of the number of CPU cores by default.

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