A customer is having an issue in their environment that everytime they try and introduce a server beyond their current standard patch level (NW65SP7 & eDir 8.8 SP3 (20216.83)) they start having authentication issue

They have twice previously tried installing a NW65SP8 server and the problem has surfaced. Client give 8819 errors... By killing the server off and removing all traces from eDir, and rebooting the 'master' edir servers the situation returns to normal

Today we tried to introduce an OES2SP2 Linux server - same issues...

I'm thinking NMAS...? Whlst these problems occur nds sync, etc. all looks fine, no apparent issues server side, but clients lose connections and can't (re)authenticate

Any suggestions welcome!