[Rathji]

Honestly, anyone who has access to the devices themselves and can't solve this in a couple hours isn't really trying very hard. Of course, I know that being in IT I have a lot of things on my plate that I don't even think about on a normal day that people are expecting me to be working on. Personally if someone told me they could print at our central office when they were sitting in a desk at our remote office, I would probably just tell them to email whatever they wanted printed.

Being able to access it at 7am is kind of interesting though. That might be the key to figuring this out.

What is different at 7am? Consider all factors

Maybe the person who has their desk above the switch is kicking the switch every day and sometimes it loses connection. That doesn't explain this particular problem, but it is the kind of thinking that might point you in the right direction

Are there machines off at that time? Maybe 2 devices are sharing a static IP address or the static IP is in the DHCP range,it shouldn't matter but who knows if printer is off when the lease for their IP expires maybe 2 devices end up with the same IP

Is there some sort of network access policy or filters on the router that restricts traffic to certain URL/IP ranges at certain times? Maybe something was set to deny when it should have been allow or maybe an old rule is causing problems when it shouldn't be. Again this probably shouldn't cause the problem you are talking about, but i have seen some pretty messed up rule sets for firewalls