Re-authenticate when the Status & troubleshooting tab of the Fortnox app shows a red status and an error for the connection. To re-authenticate your Fortnox connection in Upsales:

1. Click Settings → App directory → Fortnox (or Fortnox Premium) and open the Settings tab

2. Click Revoke authentication: 

   
   
   
   
3. Click Logga in i Fortnox and log in with the same Fortnox account as before.
4. Click Save authentication. The field now shows Connected with oAuth and the status on the Status & troubleshooting tab turns green.
5. For any issues, please contact our support team

The Fortnox account connected from Upsales needs to have the highest possible permissions in Fortnox.