I inadvertently forgot NOT to create an Exchange 2010 mailbox for a new user, and instead used the ADUC (which homes to a 2003 server). Now I have a Legacy Mailbox for this new user. I have tried:
Set-Mailbox "username" -ApplyMandatoryProperties
But it returns the following error:
Can't apply mandatory properties on mailbox "username" because it is hosted on a legacy exchange server (not true of course).
*CategoryInfo : NotSpecified: (:) [Set-Mailbox], TaskInvalidOperationException
*FullyQualifiedErrorId: 2336176B, Microsoft,Exchange,Management,RecipientTasks.SetMailbox
Google is leading me in a circle and I need to get this fixed. Any reply appreciated.