I have a network printer with a static IP. Staff get this printer via GPO.
Trouble is it frequently goes offline for staff. Initially, I thought it was caused by staff accounts expiring, as it doesn't go offline for everyone at the same time, but I have been able to demonstrate that is not the case.
A reboot of the pc with the issue mostly resolves this, but not always. Also, staff have reported to me that the printer is offline but when I go to look at the problem, sometimes the printer has spontaneously come back online!
It also doesn't happen for the same pc's over and over, it seems quite random.
(Staff are on Windows 7 pc's, printer is configured from Windows 2008 server, GPO is on Windows 2012)