Hi,
Based on the error code, I suggest you try this method to remove the cached Office account identities from the registry:
- Start Registry Editor.
- Locate the following registry subkey:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\Identity
- Right-click Identity, and then select Delete.
Just checking in to see if the information was helpful. Please let us know if you would like further assistance.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.