To re-authenticate your Fortnox connection in Upsales:

1. Click Settings → Fortnox → Settings tab
2. Click Delete, and then click Save
   
   
   
   
3. Login again with the same Fortnox account that you deleted the connection. It should now show "Authenticated with oAuth" and the status tab will be green.
4. For any issues, please contact our support team.
   
   Remember to save your changes