... I tested the office outlet with a meter and got nothing at all (110v). Attempted to test the resistance (1K) and it spikes. Which, if I understand correctly, is supposed to happen with a switch but not on the outlet.
Now, here's another thing that baffles me. If I have the old switch attached and test for resistance with the switch in the off position, I get nothing on both outlet and switch. But if I turn on the switch, I get a big spike (1K) in the outlet on the wall. .
Breaker! breaker! (with a double meaning).
Important reminder. Turn off the power before doing resistance or continuity measurements. Otherwise you can damage your meter or cause an arc that startles you.
Also, for best results, at least one of the wires or terminals you touch the meter probes to when doing resistance readings should have nothing else connected to it when the meter probe is touched. (Unless the entire bundle and all pathways leading from the bundle are part of the test subject.)
Now back to our regularly scheduled programming.
If it worked before and you changed out a light or receptacle and now it does not work, you probably made a mistake in hooking it back up, or a wire broke somewhere. It is not unheard of for a wire to break inside the insulation. Not because the wires are old but rather the receptacle was changed out once or twice in the past and the wires can only take so much flexing and restuffing back into the box.
Do you get coverage you can count on? From the bag of fertilizer? From your lawn sprinklers?