Microsoft 365 backup getting error "Failed to login to GraphService, reason = login.microsoftonline.com"
Article ID
2070
Product Version
AhsayCBS / AhsayOBM: 9.1 or above
Operating System
All Platforms
Symptom
Microsoft 365 backup gets this error:
Failed to login to GraphService, reason = login.microsoftonline.com
Cause
This error occurs when the client machine cannot access the Microsoft 365 site.
Resolution
Ensure the following steps are followed:
- Check the firewall policy to ensure access to Microsoft is allowed.
- Try pinging the Microsoft site to ensure it is reachable.
- After verifying that the Microsoft site is accessible, re-authenticate the M365 account.
To re-authenticate Run on Client backup sets:
- Open AhsayOBM and click Backup Sets then select the affected backup set.
- Go to General then click Change settings.
- Click Next then Authorize to start the authentication process.
To re-authenticate Run on Server backup sets:
- Open AhsayCBS and go to Backup / Restore > Users, Groups & Policies.
- Select the affected backup user then go to Backup Set then click the affected backup set.
- In General, click Change settings.
- Click Next then Authorize to start the authentication process.