I,ve followed the instructions via this link http://www.groovypost.com/howto/microsoft/add-a-second-additional-mailbox-in-outlook-2010/ to add User A to my own mailbox. User A has given me complete access rights (Outlook 2010 > Folder list > Info > Account Settings > Folder permissions). In the navigation pane User A is visible in my mailbox but when I try to open it I'm getting an error which indicate Outlook can not open the folderlocation, no object can be found. I can however access User A folders through Outlook > Folder > Open > Folder of other user. We have a Exchange 2010 SP1 non-cached environment with Outlook 2010.
How can I make this work?