Hello, I have a trouble: can't connect additional mailbox, when it marked as hidden. Trick "/o=MyOrg/ou=First Administrative Group/ou=Recipients/cn=MailboxUser" is not working, when mailbox resides on Exchange Server 2010 (SP1). Manual method (unhide-add-hide mailbox) is not suitable. This is BIG problem for my organization! Any suggestions?br, vsf

Hi, As far as I know, there is no method to add a hidden mailbox to your outlook profile. You can only access the hidden mailbox by using OWA.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT

The problem seems to disappear after the installation RU2. br, vsf

Hi vsf, Thank you for your feedback.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT