For some a share is available to \\hostname\share and not \\IPAddress\share but others it's ok. Just this one server, not others.

Hi all.  Happy Friday.

I have a file server (Server 2008r) that for some IS accessible by \\ipaddress and for others is not, they get told 'There are currently no logon servers available to service the logon request'.  Just this one server, not others.

The LAN is working and has been for some time.

Any thoughts? 

Thanks.

Paul.