Hello, I am using Outlook 365 on a windows 10 Pro PC version 20H2 - 19042.844

A few months ago I started getting the Not Implemented error on Send/Receive. I was using my Outlook.com email address in Outlook.


Tried both repair options with no luck.

Uninstalled office 365 several times with no luck, I tried a different profile with no success. Removed add-ins and also deleted the account, then uninstalled/reinstalled Office with no change - same Not Implemented error happening with no email account even loaded in Outlook.
The last few times I uninstalled and reinstalled Office, I am now getting a script error dialog box popping up on startup (picture below). Also, when trying to add an email account, the Not implemented error pops up. Note that all other Office programs work fine.

Attached Images

Screenshot 2021-03-07 101520.jpg (28.9 KB, 11 views)