Trying to retrieve files via SharePoint Online (safe.microsoft-sharepoint) always results in an access token expiration on FME server

Hi

When my published workspace on the FME Server makes a call against Sharepoint (graph.microsoft.com...) in order to download or upload files, it always results into a SharepointRESTAPIException and needs to republish the workspace with a reauthenticated web connection again and again and again in order to make it work:

2022-7-12 16:17:49 | Python Exception <SharepointRESTAPIException>: SharepointOnlineConnector: Error making request to https://graph.microsoft.com/v1.0/sites/[TENANT].sharepoint.com,[MYSHAREPOINTSITE] Access token has expired or is not yet valid.

This way, an automation is absolutely impossible since manual actions are required.

Our admins tell that the registered app on the Azure AD cannot be changed regarding the refresh token timeout:

https://docs.microsoft.com/en-us/azure/active-directory/develop/refresh-tokens#refresh-token-lifetime

The request parameters in the web connection definition looks like this:

client_id=[CLIENT_ID]&client_secret=[CLIENT_SECRET]&refresh_token=[REFRESH_TOKEN]&grant_type=refresh_token

I actually don't know what has to be done to set up stable SharePoint requests so the token does not expire but reliably gets refreshed.

What can we miss here?

The connection works but the refresh token issue is extremely annoying and actually a stopper here.

Thanks!