Users cannot connet to server


I’ve migrated to a new server and done a clean install of openfire. using spark, the message I get when trying to connect to the server is Cant connect to server. invalid name or server not reachable.

All our users are on the local domain.

Firewall is open for openfire on server and on client (for spark) and I am trying either the server name or the ip address. neither work. Has anybody got any suggestions please?

Sorry to bother but thanks a billion for your help!