Try the following in order:

Option 1

Run  "%localappdata%\Microsoft\OneDrive\onedrive.exe /reset"

Option 2

  1. Turned on option to allow Office to sync files.

  2. Deleted "%localappdata%\Microsoft\Office\16.0\OfficeFileCache" folder

  3. Run "%localappdata%\Microsoft\OneDrive\onedrive.exe /reset"

  4. Run "%localappdata%\Microsoft\OneDrive\onedrive.exe"

Option 3

1. Open Word/Excel or Powerpoint and select Account (Or File > Account)
On the account screen, under User Information, sign out of all accounts . Please then close all MS Office Apps

2. Disconnect your Uni  account from Start Menu > Settings > Accounts > Email and Accounts > Access work or school. Find your @uni  account and click remove

3. Navigate to Start menu> Control panel> Credentials manager> Windows Credentials > delete all the saved university credentials.
Now restart your machine.

4. Navigate to
C:/ drive> Users> Username> AppData> Local> Microsoft> Office> Right click the folder and rename to Office.old

5. Once logged back in, open Word/Excel/Powerpoint application and sign-in with Microsoft credentials (uni email)

6.When prompted, it would be preferable for them to de-select 'allow you org to manage setting on this device' you must select 'This App Only'
Please now try opening/saving files to Onedrive again

Thanks to everyone on this thread

This information is intended for general information purposes only and to assist customers in understanding system functionality. It should not be construed as legal advice or opinion on any specific facts or circumstances. You are advised to consult your own compliance staff or attorney regarding your specific questions or situation to ensure your compliance with company policies & procedures, applicable laws, and regulations.