Outlook 2011 crashes every time

Outlook 2011 crashes every time when it tries to access an exchange online account that is not being used any (user account has been deleted from server but I still like to keep the local data). For the past half year this did not create an issue but somehow it now crashes almost instantly with the following  error message:

Microsoft Error Reporting log version: 2.0

Error Signature:
Exception: EXC_BAD_ACCESS
Date/Time: 2014-09-08 15:55:54 +0000
Application Name: Microsoft Outlook
Application Bundle ID: com.microsoft.Outlook
Application Signature: OPIM
Application Version: 14.4.4.140807
Crashed Module Name: Microsoft Outlook
Crashed Module Version: 14.4.4.140807
Crashed Module Offset: 0x002d1209
Blame Module Name: Microsoft Outlook
Blame Module Version: 14.4.4.140807
Blame Module Offset: 0x002d1209
Application LCID: 1031
Extra app info: Reg=en Loc=0x0407
Crashed thread: 7

any idea ?