When upgrading an existing Exchange 2010 SP1 environment to SP2 the setup of one of the servers fails with the following error:
- Setup previously failed while performing the action “Install”. You can’t resume setup by performing the action ‘BuildToBuildUpgrade”.
The option Run as Administrator doesn’t help. It turns out that setup writes information in the registry and this information wasn’t cleaned up properly during an earlier action. To remove this information, open the Registry Editor and navigate to the following key.
Select the appropriate Server Role ( MailboxRole) and delete the Registry Keys labeled “Watermark” and “Action”.
When done reboot the server and the upgrade to SP2 succeeds as expected.