A family of Microsoft relational database management systems designed for ease of use.
Yeah, when I try to revert to 16.0.9001.2138 the 'Downloading updates' box appears for a while, then I get a generic 'Something went wrong' message and it stops...
@RAB1
Contact Microsoft Office365 Support. Tell them you need to revert your office installation to 9001.2138 and that it doesn't work, tell them the error message you receive verbatim. They should be able to help. If need be they will take remote control and do what needs to be done.