we successfully migrated to multi-send.
Our Znuny is connected to 2 Microsoft365 Tenants. Both App Registrations worked fine, and are exactly identicaly.
One of them is running rock-solid and keeps regenerating the Accesstoken automaticly.
The other one claims that "Bisher wurde kein Refresh-Token angefordert." meaning "Refreshtoken has not been claimed yet".
If i click the "refresh" button I get my oauth-dialogue and can successfully regenerate an access token.
I'm pretty clue-less what else I could try.
Today I updated to 9.3.2 but still got the same problem.
Happy to hear from you,
Lars