Hello,
I was able to find another forum poster having the same issue, apparently this has something to do with onedrive credentials.
Empty credential manager and check the result:
- **** Go to Start -> Control Panel.
- Go to User Accounts and Family Safety -> Click on User Accounts.
- In the left pane, click Manage your credentials.
Now look for the live account ID and password (for OneDrive) in the credential manager and remove it and restart the computer.
Open powerpoint and try to sign into the OneDrive and check if you can access the documents.
Go to File> Accounts and add OneDrive account.
Let me know how it goes,
JC