I have a similar issue that started yesterday and is ongoing. I have two switches in two different buildings on the same property. Each one has two or three axis cameras being powered in addition to 8 access points on one and 11 on the other.   The cameras have been fine since I installed them last week. The access points go offline for no apparent reason even though the power  budget is fine and according to the switch, the link and power is fine. Cable test is perfect on every port and I can ping every access point. Rebooting each switch usually brings all the access points back up for maybe a couple of hours and they they go down again.   In my case, there is no apparent power or connectivity loss. I'm not sure if this helps at all since it sounds like my situation is a bit different? The switches are both MS120-24P and the access points are all MR33's. ... View more