Error Message

Application crash events are logged into the application event logs:

Log Name:        Application Error
Source:            Application
Event ID:        1000
Task Category:    Application Crashing Events (100)
Level:            Error
Computer:        Client1.ev.local
Description:
Faulting application name: OUTLOOK.EXE, version: 16.0.14931.20888, time stamp: 0x63b55bd0
Faulting module name: ucrtbase.dll, version: 10.0.19041.3636, time stamp: 0x81cf5d89
Exception code: 0xc0000005
Fault offset: 0x0000000000026f80
Faulting process id: 0x3a70
Faulting application start time: 0x01da48932bdc57f4
Faulting application path: C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE
Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
Report Id: 8382edaf-b775-4444-8b3a-bb3673e65416
Faulting package full name: 
Faulting package-relative application ID: 

Log Name:        Outlook
Source:            Application
Event ID:        1000
Task Category:    0
Level:            Error
Description:
Add-in execution error. Outlook crashed during the 'Forward' callback of the 'ItemEvents_10' interface while calling into the 'RenAppProxyControllerCreateInstance' add-in. 

Two distinct issues causing the outlook to crash were noticed as follows:

1. String formatting operation in the EV add-in caused runtime exception due to a possible update to Windows ucrtbase.dll that might have caused a regression in C++ runtime.

2. The Outlook GetNamespace() dispatch method was failing to return the ‘MAPI’ namespace.

Code changes have been made to handle the specific conditions causing the issue.

The fix for this issue is available in EV Outlook Add-in 14.5.2.