When you deploy the Microsoft 365 Apps (a.k.a. the normal Microsoft Office apps such as Word etc.) via Intune, you can choose which version you want to deploy using the “Version to install” option. If you change it from “Latest version” to a specific version, and then later on switch it back to Latest version, Office may stop updating entirely.

The cause of this seems to be a redundant registry key that Intune forgets to unset. The key is located at:

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\Configuration\UpdateToVersion

It contains the exact version Office should update to (and remain at), e.g.:

16.0.16731.20316

You can fix this by deploying a remediation script. This detection script detects if the key is present:

reg query "HKLM\SOFTWARE\Microsoft\Office\ClickToRun\Configuration" /v "UpdateToVersion"
 
If($LASTEXITCODE -eq 0) {
    Write-Host "UpdateToVersion key exists, remediation needed."
    Exit 1
} Else {
    Write-Host "UpdateToVersion key does not exist, no remediation needed."
    Exit 0
}

And this remediation script deletes it:

reg delete "HKLM\SOFTWARE\Microsoft\Office\ClickToRun\Configuration" /v "UpdateToVersion" /f

Do note that if you ever want to update to a specific version again, you may need to disable the remediation script.

• https://www.reddit.com/r/Intune/comments/mnk2f6/office_365_proplus_stuck_on_target_version/?rdt=51802