Outlook 2011 and Exchange 2013 – the Outlook 2011 Client shows connected to “User”

Hi

We have an Exchange server 2013 CU5, also several Clients with Window 7 / Office 2013 and Mac Book Users with Office 2011 (included the last updates)

and we have a very (!) mystique error with a Client (except different others - waiting for Office 2014 (?) for Mac)

normally the connection in calendar tab is shown connected to Organization

(like screenshot)

But we have a Mac user with Office 2011, his Outlook is connected to "a user name"

Only when switching to calendar, when using E-Mail it´s shown like above

(Wrong Connection)

Fact is...he looks on his own calendar, but when creating new entries, he is doing this into the calendar of the "connected user"

very strange

why?

Best regards

Lutz