tickets are not created and the mails are not deleted from the mailbox
everything worked until last monday. We changed nothing. Each setting resembles the documentation. Reauthenticate + deleting channel + add as new m365 account doesnt help.
You don’t have a second Zammad installation laying around to test stuff do you?
If this is an exact copy, most likely your mail is landing there.
At least that would explain your explanation, you wouldn’t be the first to have this happen.-