One single empty email would cause Outlook to segfault on every start up.

Now it only segfaults 3 times a week, until today, when it actually crashed while crashing with the Microsoft Error Reporting half way open. After i force quit Outlook I realised how long it had been unresponsive for:

Process: Microsoft Outlook (Outlook) [13054]
Path: /Applications/Microsoft Outlook.app/Contents/MacOS/Microsoft Outlook
Architecture: i386
Parent: launchd [1]
UID: 501
Task size: 47277 pages
CPU Time: 1.476s
Note: Unresponsive for 6989 seconds before sampling

Yes. 6989 seconds. That’s almost 2 hours.

EDIT 1

Another crash today, this time its a segfault.

Microsoft Error Reporting log version: 2.0

Error Signature:
Exception: EXC_BAD_ACCESS
Date/Time: 2015-02-26 14:50:41 +0000
Application Name: Microsoft Outlook
Application Bundle ID: com.microsoft.Outlook
Application Signature: OPIM
Application Version: 15.6.150113
Crashed Module Name: Microsoft Outlook
Crashed Module Version: 15.6.150113
Crashed Module Offset: 0x005b4dc2
Blame Module Name: Microsoft Outlook
Blame Module Version: 15.6.150113
Blame Module Offset: 0x005b4dc2
Application LCID: 1033
Extra app info: Reg=en Loc=0x0409
Crashed thread: 22

EDIT 2

Third crash today, another segfault.

Error Signature:
Exception: EXC_BAD_ACCESS
Date/Time: 2015-02-26 15:10:09 +0000
Application Name: Microsoft Outlook
Application Bundle ID: com.microsoft.Outlook
Application Signature: OPIM
Application Version: 15.6.150113
Crashed Module Name: OutlookCore
Crashed Module Version: 15.6.150113
Crashed Module Offset: 0x000a0b50
Blame Module Name: OutlookCore
Blame Module Version: 15.6.150113
Blame Module Offset: 0x000a0b50
Application LCID: 1033
Extra app info: Reg=en Loc=0x0409
Crashed thread: 0