In an embodiment, a requesting UE configures an RCS capabilities request message to request a target UE to provide RCS capability information (i) for the target UE, and (ii) for a set of other UEs. The requesting UE transmits the configured RCS capabilities request message to the target UE. The target UE determines that the target UE has access to RCS capability information for at least one UE from the set of other UEs, and configures an RCS capabilities response message that indicates the RCS capability information (i) for the target UE and (ii) for the at least one UE. The target UE transmits the configured RCS capabilities response message to the requesting UE. In another embodiment, a given UE determines whether to perform an RCS capability information refresh operation based on whether RCS capability information for another UE is older than a priority-specific age threshold.