Update-Help errors to file or variable

I plan to perform rapid update of PowerShell help from fileshare.
So I installed on one server RSAT-Role-Tools & RSAT-Feature-Tools -IncludeAllSubFeature and perform Save-Help –DestinationPath \fs1\PSHelp
When I run Update-Help on domain controllers I get this error:
Failed to update Help for the module(s) ‘ADDSDeployment’ with UI culture(s) {en-US}
It’s not a big deal to Update-Help -Online on server with such errors, but I want to fix such errors in text file (and send it to email).
I tried Update-Help with “-ErrorVariable” and " | Out-File" but nothing in variable or file.
Any ideas?

Sounds like the server you used for the Save-Help doesn’t have the ‘ADDSDeployment’ module?

Yes, that’s wright.
But it’s ok - I just need to fix errors now to solve 'em later.