2. Interoperability Vendor Alliance (IVA): A community of software and hardware vendors whose goal is to improve interoperability with Microsoft products and systems.

6. Initiate and handle sessions involving multimedia elements like video, voice, IM, virtual reality, and animation. SIP is one of the main protocols used for VoIP and is used only for setting up and tearing down video and voice calls. This protocol helps clients like IP gateways or IP-PBXs to interoperate with Exchange Server 2007 Unified Messaging via SIP servers.

7. Real-time Transport Protocol (RTP)

9. Using SOAP messages, Exchange Server 2007 communicates with computer and Web service client applications. The Exchange Web services implement SOAP to provide information on data, its versioning and the operation to be performed on that data, to the messaging client application.

10. XML protocol

11. This protocol provides a standard messaging format that makes it possible to exchange information between client applications and Exchange Server 2007.

12. T.38 Fax Protocol

14. MAPI provides access to items and folders within public and private databases, as well as the properties stored along with each item. Developers can create clients that use MAPI and can interoperate with Exchange Server 2007. For more technical details on MAPI, visit MAPI Evaluation Criteria.

15. Entourage for Mac

17. Various clients use the IMAP4 protocol to access and manipulate messaging data on a server. Exchange Server 2007 supports IMAP4 and allows IMAP4-based e-mail clients to access mailbox data.

18. POP3

19. POP3 is another protocol used by clients to store on and retrieve messages from the server. Exchange Server 2007 allows POP3 e-mail clients to access mailbox data.

21. Technical Interoperability Scenarios

22. Achieving Interoperability through Standards

23. Other forums and blogs about Exchange Server 2007 and open specifications of Microsoft products include:

24. Using the Exchange Server Protocols

25. Documentation on Standards

26. Exchange Development Forums

27. Exchange API-spotting

28. Exchange Developer Roadmap

30. Port25 is the blog space of open source community at Microsoft to interact with customers and other open source industry people. It includes conversations on Linux, Microsoft Windows®, and open source interoperability.

32. http://msdn.microsoft.com/en-us/library/cc307725.aspx

33. Microsoft Exchange Server Standards

34. http://msdn.microsoft.com/en-us/library/cc973105.aspx

35. http://technet.microsoft.com/en-us/library/cc540463.aspx

36. Microsoft Exchange Server 2007 RFC and Support for Standards

37. http://technet.microsoft.com/en-us/library/cc540463.aspx

38. Exchange Server Developer Center

39. http://msdn.microsoft.com/en-us/exchange/default.aspx

40. Exchange Server 2007 Legacy API Property Mapping

41. http://www.microsoft.com/DOWNLOADS/details.aspx?FamilyID=cde26ea9-5647-448f-a5e6-ae094a882ee5&displaylang=en

43. http://msdn.microsoft.com/en-us/library/aa579299.aspx