It sounds like you're experiencing a common issue where Windows 11 devices lose activation status after upgrading to version 24H2 through WSUS.
Possible Solutions:
Reactivation Script:
Create a PowerShell script that runs after upgrade to reactivate using your MAK key:
powershell
slmgr /ipk YOUR-MAK-KEY-HERE
slmgr /ato
WSUS Post-Install Command:
Configure WSUS to run the activation commands after the upgrade completes
Check Licensing Service:
Ensure the Software Protection service is running after upgrade
Verify the license status with slmgr /dlv
Alternative Activation Method:
If these are domain-joined Education machines, consider using KMS activation instead of MAK
Root Cause:
This typically happens because:
The upgrade process doesn't properly migrate activation status
The product key gets reset during major version upgrades
There might be a mismatch between the edition being upgraded and the target edition