Sorry for the late reply.
Here are the sections of the logs that look interesting:
[2013-11-01 16:46:25.332] Process:OUTLOOK |Thread:4780 |Category: Unmanaged.Platform |User: PlatformUser |Level: Error | HrGetOneMAPIProp File: c:\bt\32867\src\application\outlook\addin\crmmapiutil.cpp Line: 376
>hr = 0x8004010f
[2013-11-01 16:46:25.332] Process:OUTLOOK |Thread:4780 |Category: Unmanaged.Platform |User: PlatformUser |Level: Error | HrReopenMAPIMessage File: c:\bt\32867\src\application\outlook\addin\common.cpp Line: 1168
>hr = 0x80070057
[2013-11-01 16:46:25.332] Process:OUTLOOK |Thread:4780 |Category: Unmanaged.Platform |User: PlatformUser |Level: Error | CInspectorWrapper::UpdateOpenInspectorsCollection File: c:\bt\32867\src\application\outlook\addin\inspectorwrapper.cpp Line: 894
>hr = 0x80070057
Does this shed any light on the problem?