Most attempts at producing a unified standard for the major IM providers (AOL, Yahoo! However, while discussions at IETF were stalled, [citation needed] Reuters signed the first inter-service provider connectivity agreement on . [citation needed] This agreement enabled AIM, ICQ and MSN Messenger users to talk with Reuters Messaging counterparts and vice-versa. [citation needed] Following this, Microsoft, Yahoo! and AOL agreed to a deal in which Microsoft's Live Communications Server 2005 users would also have the possibility to talk to public instant messaging users. [citation needed] This deal established SIP/SIMPLE as a standard for protocol interoperability [citation needed] and established...
