In addition, the GS-E 182 retrieves the member record 190a assigned to Party A by interrogating Enterprise Member profile database 190 with Party A's mobile terminal number retrieved from Sender_Num field 612 of SMS message 610. Party A's member record 910a includes Party A's land-line number in association with Party A's mobile terminal MSISDN or directory number. Accordingly, GS-E 182 may modify the source address to be Party A's office number or short code in place of Party A's mobile number such that the recipient will receive the SMS with Party A's office number as the originator as depicted by Sender_Num field 612 of SMS message 610 in FIG. 6C.

In accordance with another embodiment, GS-E 182 may, upon determining the destination subscriber is a member of Enterprise X, invoke an enterprise messaging service, such as a corporate Instant Messaging service, for delivery of SMS message 610. For example, the member record for Party B retrieved from member database 190 may indicate that SMS messages are to be additionally delivered to Party B via an Instant Messaging service. Assuming the SMS message is to be additionally delivered to Party B via an Instant Messaging service, GS-E 182 may convert the SMS message to an Instant Message and send the IM to an Enterprise IM server 192 (step 654). The IM may then be forwarded to Party B, e.g., to Party B's enterprise desktop 153 (step 655). In addition, GS-E 182 may record the transaction as part of Party A's logs within the enterprise.