Recently we migrated from SBS 2008 with Exchange 2007 to seperate Windows 2008 R2 Servers and Exchange 2010. Some not all users cannot access OOF and get the message the server is currently unavailable.
All users are using Outlook 2010, autodiscover address is correct, from test. Those users that cannot access the OOF, are able to do so from Outlook Web App, just not Outlook 2010.
I have done plenty of research regarding this, and I see tons of people talking about Outlook 2007 or Exchange 2007, and some regarding logging into Outlook with a different user account. This is not the case, all users are logging into the domain and outlook with the same account...
Any thoughts? Ideas? Please, while I still have hair! :)