We've had a functioning OS Ticket 1.18.1 install running for months using the OAuth2 plugin with M365. It was a little bit tricky to setup at first, but has been rock solid since.
Sometime this week, logging in via M365 stopped working. You click the (in our case) "Sign in with Microsoft 365" button, it goes through the M365 sign in process, then redirects back to the home page. Doesn't matter if you try to log in as a user, or an agent, you end up back at the home page, and not logged in.
It doesn't matter if you clear cookies, change browsers, even different browsers on different devices. All just revert back to the home page now, without having logged in.
From what I can see, nothing changed on the OsTicket install on the server, or with the Entra integration.
Any idea what might be happening?
