all my authors and techs are unknown now :( AD sync is working, I see all of them in 'requesters'/'technicians' tab, all emails are correct etc. but when I make a new request, a catch "requester name does not exist". also, site associations is not working now.

BUT!

If request was made by email, everything is ok - request arrives with correct requester name, associated with correct site etc.

how can i fix this problem?