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What is error 1256 The remote system is not available.

DNS is not working.
What does error 1256 The remote system is not available mean?
1 Solution
Sounds like a replication error. The servers that are currently set to replicate with this server cannot resolve the name of this server to its new IP address.  Have you made any network change recently??? If you did then this is probably down to the fact that the network change hasn't updated in DNS.  Point the server that is unable to replicate to a central DNS server and restart NETLOGON.  Manually trigger replication with a DC that is pointing to the same DNS server, or wait for replication of the DNS updates to propagate, then manually replicate.  Once done, you can change DNS back to what it was (assuming it was a valid configuration).

Note.  If the DC is pointing to self for DNS, ensure that it's listening on all interfaces, or the single interface has been updated.


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