In Call Manager I created a SIP Trunk to my presence server as part of the basic deployment. I had to pick a "Device Pool" for this sip trunk. I want this Presence server to be to see devices in all of my device pools. How do I accomplish that?
The device pool has nothing to do with what devices' status will be published on the trunk. That is limited by the Presence Group (in CUCM, not CUP). Most clusters only have one but if you have multiple be sure whatever is choosen has allow subscription to all others.