I have a problem that I have been testing for quite some time now. In summary, it seems that whenever I use Excel, PowerPoint or Word (2010 version, 64Bit) and the "Send Using E-Mail" feature, my Office apps crash. Outlook 2010 does not crash but any of the other apps will crash.

I am running on a Dell Latitude E6410, Windows 7 64Bit.
MS-Office 2010 64Bit version installed.
I am using Client: 6.06.6058.8
Server: 6.0.3_GA_1915.UBUNTU8

When the crash occurs, I get this Event Viewer error message:

Faulting application name: EXCEL.EXE, version: 14.0.4756.1000, time stamp: 0x4b9c08e8
Faulting module name: mspst32.dll_unloaded, version:, time stamp: 0x4ba8fe02
Exception code: 0xc0000005
Fault offset: 0x658eb73d
Faulting process id: 0x1844
Faulting application start time: 0x01cbcc82510e250e
Faulting application path: C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
Faulting module path: mspst32.dll
Report Id: 98cfc482-3875-11e0-8def-ed8ab45958f9

Now, what is interesting is this. Nothing in my Zimbra debugging indicates a particular issue with the Zimbra Outlook Connector. However, there is one key set of tests that I have done:

a) If I set my default email account to be something like Windows Live Email, I do not get the crashes.
b) If I remove the Zimbra connector from Outlook and just setup an IMAP account in Outlook, I never get the crashes.
c) It only seems to be when the Zimbra connector is installed do I get these errors.
d) I have disabled all add-ins for my other Office Apps.
e) I have even replicated this problem when starting my other Office Apps in Safe Mode.

Could this be an issue with the Zimbra Connector and 64Bit Office 2010? Notice that mspst32.dll is involved. I have tried doing repairs, uninstalls and reinstalls and even renames of this particular file and nothing is solving the problem.

I am wondering if the Zimbra connector changes or somehow has a bad effect on mspst32.dll or something? I did notice another article related to Access but I am not sure if those errors are related.

Thanks to anyone that has any ideas.