Sorry if I am posting in the wrong section. if this is the wrong forum, can please direct me to the correct forum.
We setup a vendors application OAuth app based authentication in Azure.
From time to time, the error message ("...(401)Unauthorized") appears on the vendors portal. We are purely O365, AD on-premise with AAD.
I don't know what could be wrong or where to look from O365 side.
Can you please advise.
