[otrs] LDAP Sync broken after DC certificate change

Hello, due to the migration of our CA to SHA256 i had to generate new certificates for our domain controllers. OTRS is configured to use Port 389 so there should be no certificate needed when synchoing Domain Users. But somehow after changing the certificates on the domaincontrollers the domain user sync of OTRS stopped working. I am a complete newb to OTRS, if you need any info regarding the config or log files, let me know. Best regards, hannes