Why do KES clients have invalid licenses after K server migration?
This can arise after a migration if you install KES on the new system after restoring the DB - the new installation will overwrite the license code on your server.
There are two options to recover from this: -
1) restore the database again
2) reinstall KES on the end points to update their license code- go to Security > Install / Remove-select all the machines with invalid licenses- click Install (do not need to remove first)
Kaseya Endpoint Security(KES)