Hello!
We have an issue with the login to our OTRS. Our login suddenly stops working without any regularities. After some time the login works again without any actions performed by us. This error is totally random, neither we could find a way to reproduce it, nor there were any errors in our OTRS logs, apache logs or syslogs. The login simply doesn´t proceed with the message that the login credentials are invalid. We checked the AD, our Firewall, and our DNS settings, there seems to be no issue so far.
OTRS is running on a VM with Debian Jessie, our DC is running on Windows Server 2012 R2. We migrated our previous OTRS 3.0 from a dedicated machine to a VM and updated it in steps up to OTRS 5.
Does anybody have an idea where this issues comes from? Because of its randomness, it´s hard for us to grab any error here. I´d be very thankful for any ideas. I´ll glady provide any information that is required to resolve this issue.
Thanks alot in advance and best greetings!