Generally, the XenApp License Acquisition Error 500 displays because the member server already acquires a license before the license server failed.

In that case, it cannot properly verify if the license is accurate.

Here at Bobcares, we often handle requests from our customers to fix similar errors as a part of our Server Management Services.

Today, let us see how we can fix this error.

XenApp License Acquisition Error 500

Usually, we receive the following error when we log in to the server:

Citrix License Acquisition Error (500)

Or

“Citrix Presentation Server license acquisition error (-25): Unable to acquire a license from <server name> server. Please contact your system administrator or open Event Viewer for more details.”

Mostly, this affects Citrix systems like Citrix Presentation Server Version 4.5, Xen App 4.0, 4.5, 5.0

After a licensing failure and subsequent recovery of the license server, individual member servers might experience issues when users attempt to log on.

This will lead to the following error message:

“-500 license acquisition”

Moving ahead, let us see how our Support Techs fix this issue for our customers.

In order to fix this, there are two tasks we need to perform.

We need to either restart the server.

or

If it is not possible to restart the server, we need to complete the following steps:

1. Initially, we launch the Citrix Computer Policy in the Citrix AppCenter.
2. Then we browse to “Licensing | License server hostname”.
3. In here, we add a false server name in the Value field.
4. Click OK two times.
5. Finally, from the command window, we run:

   gpupdate /force.

We then need to repeat Steps 1 to 5. However, in Step 3, we add the correct License Server name in the Value field.

[Coouldn’t figure it out? Don’t worry, we are available 24*7]

Conclusion

In short, we saw how our Support Techs fix the XenApp license error.