An apparatus includes at least one memory including computer program code and at least one processor. The at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to receive a message containing no media content, the message indicating one or more supported media types by a group, cross-check the indicated supported media types with usable media types in the group, based on the cross-check, determine whether at least one of the indicated supported media types is found in the usable media types in the group and, based on the determination, send the message without modifying the indicated supported media types if all of the indicated supported media types are determined to be usable media types.