Created attachment 9055 [details] Output From Samba Server Trying to Join the Domain Attached is the output from a DC "STORAGEMIRROR" trying to be joined to another samba DC "PDC" ... The join fails with "WERR_DS_DRA_INVALID_PARAMETER" I've tried rebuilding samba on the local DC, this happens with different samba builds (I've tried all builds since 4.0.4). I've also tried clearing out all the files in /usr/local/samba each time I build I've also tried backing up and restoring the remote DC, with no luck. The remote DC is still functional. Active Directory still works...it's just no DCs can join to it.
we've seen this then the sam ldb data base files had been modified manually in a non proper way. This might be the same problem here but it needs a deep look at the system to say more details on this. Closing this as worksforme.