I have added a fourth DC to my domain. 2 windows dc's that will go away soon and 2 samba DCs. No issues during install/join or verification. DNS is updated and works across the domain. # samba-tool drs showrepl ERROR(<class 'samba.drs_utils.drsException'>): DRS connection to hp-srv13.XYZ.se failed - drsException: DRS connection to hp-srv13.XYZ.se failed: (3221226047, 'No service is operating at the destination port of the transport on the remote system.') # samba-tool visualize reps - does show the complete topology ( 4 nodes) on both Samba DC's. The showrepl command works on the other nodes and shows the hp-srv13 in the replication status fields. Also, if I type # samba-tool drs showrepl hp-srv12 (the other Samba DC) on hp-srv13, there is no error message. Same correct output as on hp-srv12. The smb.conf files are identical on both srv12 and srv13 (except the hostnames oc). Any ideas? -- ------ -------------------- 8 ------------------ ------ IT truism: "A permanent solution is a temporary solution that works so well that noone want to replace it." Anders ?stling +46 768 716 165 (Mobil)