after much troubleshooting this morning, we were forced to uninstall kb4038777 on our 2008 r2 domain controllers and restart them. it appears LDAP authentication is failing over port 389 for a handful of our applications, as well as our production mailarchiva instance.
this patch also broke our staff’s ability to push new data to our on-premise gitlab instance; process results in a 502 error page. removing the kb4038777 patch resolved the issue.
was curious if anyone else had seen / experienced similar.