Hi Giovanni Luca Matera,I'm glad that you were able to resolve your issue and thank you for posting your solution so that others experiencing the same thing can easily reference this! Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others ", I'll repost your solution in case you'd like to "Accept " the answer.Issue: Having an issue with installing Windows Admin Center Extension on my Azure Stack HCI 23H2 cluster, which consists of two nodes. One of the nodes is experiencing problems with the Windows Admin Center. I tried to uninstall and reinstall it, but I'm still encountering the same error.
Error log: Retrieving the virtual machine instance metadata information, Retrieve Certificate:
Failed to retrieve certificate from key vault using app service
Solution: Change the firewall rules on both nodes in the cluster
netsh advfirewall firewall add rule name=“AllowPort6516” protocol=TCP dir=in localport=6516 action=allow
Uninstalled the Extensions Windows Admin Center and then tried installing Admin Center again, and now it works.
If you have any other questions or are still running into more issues, please let me know. Thank you again for your time and patience throughout this issue.
Please remember to "Accept Answer" if any answer/reply helped, so that others in the community facing similar issues can easily find the solution.