It has been working OK for a while. Now, when I try to do backups WHS says the clients are offline. When I try to log in from the clients, they say that the server is offline. Yet, if I go the "Network" on the server it sees the clients. Any help will
be appreciated.
Did you install/update any security suite on client or server? Such software may block communication with WHS.
Has the router been changed so that DNS name resolution issues may occur?
Sorry it has taken so long to respond. No, no new software and the router has not been changed. I re-booted the router but no change. As above, I can access the clients in "Network" but not in WHS.