Last Updated: September 6, 2023
ISSUE
When you send a meeting invite that includes a Loop component, Outlook crashes when you click Send. This issue happens after updating to Version 2307 Build 16626.20170.
In the Application Event Log the crash event will match the specifics below:
Faulting application name: OUTLOOK.EXE, version: 16.0.16626.20170, time stamp: 0x64cc6089
Faulting module name: mso20win32client.dll, version: 0.0.0.0, time stamp: 0x64cc5e7b Exception code: 0x004c620e Fault offset: 0x000000000027b5bd Faulting process id: 0x1894 Faulting application start time: 0x01d9cafedceb4b72 Faulting application path: C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE Faulting module path: C:\Program Files\Common Files\Microsoft Shared\Office16\mso20win32client.dllSTATUS: FIXED
This issue is initially fixed in build 16904.10000 which will go to Current Channel in late October 2023. See the Update History page for build release status. To check the status when the fixed build will go to the Beta Channel or Current Channel Preview see the Update History for Office Beta Channel.
Since the latest update is a security update it is not recommended to revert the build. If you urgently need to workaround the issue you can revert to the prior build that worked.
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Open a Command Prompt in Administrator context.
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Type or paste the two commands into the Command Prompt window and press Enter after each:
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cd %programfiles%\Common Files\Microsoft Shared\ClickToRun
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officec2rclient.exe /update user updatetoversion=16.0.16626.20134
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The builds to revert are taken from the Update History page, Update history for Microsoft 365 Apps (listed by date). Beta and Current Channel builds are here, Update history for Office Beta Channel.
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