outlook crashes when opening emails from specific users

So in this case, we’ll need to update the Exploit Guard policy delivered by our MDM Security Baseline in MEM. Running Get-ProcessMitigation -Name outlook.exe now shows that EnableExportAddressFilterPlus and EnableExportAddressFilter are now both OFFĪs a result, Outlook now opens and we can again accept Teams meeting invites, great! However we’re not done yet – our MDM Security Baseline policy in Endpoint Manager will come along and revert this back on next refresh. We can manually overwrite this using Set-ProcessMitigation as follows to test this solution: Set-ProcessMitigation -Name outlook.exe -Disable EnableExportAddressFilterPlus, EnableExportAddressFilter The resulting output shows the payload where EnableExportAddressFilterPlus and EnableExportAddressFilter are both set to ON Payload:ĪuditEnableExportAddressFilterPlus : NOTSET But first to confirm that these are enabled, we can run the following PowerShell command and examine the output: Get-ProcessMitigation -Name outlook.exe The article also states in Method 2 of the resolution that setting EnableExportAddressFilterPlus and EnableExportAddressFilter to false addresses this issue. NET Framework versions 4.8 and 3.5 which is why we’re seeing this behaviour. In this case, we’re running Windows 10 Enterprise 1909, Microsoft 365 Apps release 2004 on Semi-Annual Enterprise channel and devices Hybrid Azure AD joined, with the Microsoft MDM Security Baseline being applied from Endpoint Manager (formerly Intune) which includes an Exploit Guard policy. This often occurs when Windows is running the Microsoft. This happens because Windows Defender Exploit protection prevents Outlook from growing beyond its assigned memory. I came across this article from Microsoft which pointed to Windows Defender Exploit Guard: NET Runtime version 7.9151 - Fatal Execution Engine Error (00007FFAAD0A6D4E) (80131506) NET Framework 2.0 runtime error when the crash would occur.

I had an interesting issue at a customer recently where Outlook would crash to the desktop without error whenever a Teams meeting invite was selected – not ideal when we’re all trying to work from home!Įxamining the Application log in Event Viewer showed the following.

Outlook crashes when opening emails from specific users