Messaging Object Generation for Synchronous Conversation Threads

In particular embodiments, a messaging device or server may be operable to receive a message including a thread identifier or a list of conversation participants; if the message includes a thread identifier, then append the message to a locally-stored conversation thread possessing the same thread identifier; if the message includes a list of participants, then: search a plurality of locally-stored conversation threads for a conversation threads having participants matching the list of participants; and in response to a match, append the message to the matching thread; in response to failing to find a match, generate an offline identifier for the message and storing the message locally.