Issue
After adding a secondary email account in Outlook, its folders cannot be expanded. The following error is displayed:
Microsoft Outlook
Cannot expand the folder
All accounts in Outlook are Office 365 / Exchange Online. Creating a new user profile and clearing cached credentials didn't work.
Resolution
The issue was resolved by running a Quick Repair on MS Office installation.
November 2021
Microsoft 365 Apps for business (16.0.14)
Windows 10 Pro
