A presence server in a network can receive capability information about a UE in a publish message, and make that capability information available to other UEs on the network. When the UE later deregisters from the network, the UE can send an unpublish message. However, the presence server can at least partially disregard the unpublish message and continue to make the capability information about the UE available to other UEs. The presence server can also filter capability information of one or more target UEs provided to a watcher UE based on a registration status of a target UE, capabilities of the watcher UE, and/or whether a set of target UEs associated with a single user share certain capabilities.