Integration Appian - Sharepoint Error: OAuth Access Token Expired

Dear,

we have created an integration with Sharepoint  (using Authortaion Code as Authoritation Type) to add document in a specific folder months ago.

Integration worked, but yesterday I have received the following error (with the same test):

Clicking on the link, integration worked, but how can we solve this problem without a manual operation?

Thanks in advance for any suggestion