Hi everyone,
At our company, we have a Windows 2003 machine acting as a domain
controller. It also hosts shares and printers. A few days ago, accessing the
server by UNC started to work only intermittently (ex. \\servername). Now
users who do manage to connect do not always see all the shares and printers,
or if they do manage to connect to a printer or share they lose connectivity
after a while.
There is this error: Windows cannot find '\\servername'. Check the spelling
and try again, or try searching for the item by clicking the Start button and
then clicking Search.
This shows up even when using the IP address of the server.
Nslookup works and there is no problem pinging the machine. Doing an
ipconfig /flushdns on the users' computers also does not seem to .
What could be causing this?

Thanks

The server needed a reboot. Everything is working properly now.
It's strange how rebooting can fix so many problems.