Since last month, user's VDI after login shows the windows activation period has expired, need to login from an admin account for the activation.
So we have to recompose the VDI from Horizon 6, but looks like more and more VDI have this issue.
Could someone give me the idea where to start the troubleshooting?
Is the KMS server actually getting the requests though? I had an incident before where someone installed a new kms server which updated dns and none of my desktops could find the kms server. I manually specify it now.
As above, check for any rogue KMS servers that have registered in DNS - they will automatically create an SRV record with "_VLMCS", so are very easy to spot.
Past that, the following article should identify the issue quickly: