Classic Outlook and Microsoft 365 applications crashing on Windows Server 2016

Last Updated: January 17, 2025

ISSUE

After updating to Version 2412 (Build 18324.20168) or Version 2412 (Build 18324.20190), Microsoft 365 applications may crash on Windows Server 2016.

You can confirm if this is the issue by looking at the Windows Event Viewer Application Log for crash Event 1000 or Event 1001, and the following event details:   Faulting application name: WINWORD.EXE, version: 16.0.18324.20168, time stamp: 0x677832b6 Faulting module name: KERNELBASE.dll, version: 10.0.14393.5850, time stamp: 0x64253b64 Exception code: 0xc06d007e Fault offset: 0x000dcd42 Faulting process id: 0xb1b8 Faulting application start time: 0x01db655766958e10 Faulting application path: C:\Program Files (x86)\Microsoft Office\Root\Office16\WINWORD.EXE Faulting module path: C:\Windows\System32\KERNELBASE.dll

Note: "Faulting module name" and "Exception code" may vary.

STATUS: FIXED

The team has implemented a fix for this issue which is available in Version 2412 (Build 18324.20194). For more information, go to Release notes for Current Channel.

WORKAROUND

To work around the issue, you can revert to the prior Version 2411 (Build 18227.20152):

Open a Command Prompt in Administrator context.
Type or paste the two commands into the Command Prompt window and press Enter after each:
- cd %programfiles%\Common Files\Microsoft Shared\ClickToRun
- officec2rclient.exe /update user updatetoversion=16.0.18227.20152
To prevent Office updating back to the latest build you can turn off updates by clicking File, Office Account, Update Options, Disable Updates.
Put a reminder on your calendar for February 11th to re-enable updates. Or check back on this Known Issue in case it is addressed sooner.

The builds to revert are taken from the Update History page, for more information please go to Update history for Microsoft 365 Apps (listed by date).

Additional Resources

How to revert to an earlier version of Office