Oauth 2.0 and Outlook

Sierra

We have 2 ACYMailing licenses for two separate website. We followed [https://docs.acymailing.com/setup/configuration/mail-configuration/set-up-oauth-2.0] and all went well and it worked for months. Today as I was testing a new email campaign I noticed the following error: An error occurred while retrieving a new token to your SMTP server: invalid_grant. I revoked the permission and reauthenticated but I still got the error. I removed the app registration and created a new one and the error is the same.

I tested the other site and it is doing the same thing.

How do we fix this?

mihha

There is no need to open multiple support tickets and also forum topic about the same issue

I have already replied to your tickets, so please do as suggested there

If something was working for months, doesn't mean that something didn't change in the meantime, so please redo the steps suggested in the documentation and be 100% sure that everything is configured correctly