Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information related to a dedicated preconfigured uplink resource (DPUR) in a message releasing the UE to an idle mode or an inactive mode. For example, in some aspects, the information related to the DPUR may identify one or more uplink resources that are allocated to the UE to enable the UE to initiate an uplink data transmission in the idle mode or the inactive mode. The UE may transmit, based at least in part on the information related to the DPUR, uplink data while in the idle mode or the inactive mode. Numerous other aspects are provided.