Posted to Public.Exchange.Setup but I'm not sure if I should post it here instead as it's in a clustered environment. Here's the issue we're having: I tried to upgrade the clustered mailbox, first node it failed at: Mailbox Server Role - FAILED The process does not posses the "SeSecurityPrivilege" privilege which is required for this operation It passed Mailbox Role Checks I've checked a MS article on Security auditing on DC's and Exchange servers group is there. I also followed the MS article to move all active roles to another clustered mailbox server so I was trying to update a passive node. We're using single copy cluster. Any suggestions would be greatly appreciated.
