IMAP4 support. Internet Mail Access Protocol 4 (IMAP4) is a public Internet standard for e-mail and server-based mail storage. Improved IMAP4 support in Entourage X allows you to manage messages more effectively both online and offline. In addition, the IMAP4 standard enables connection to Microsoft Exchange Server and Mac.com. Q: Does anyone know if Entourage can sync with Outlook (Windows) users? I can see from Microsoft's website (see above text) that it will sync with EXCHANGE SERVER itself, but what about with Outlook -- PC users can do it without Exchange. What's the deal? It seems that (according to Microsoft) MS is moving toward IMAP4 instead of Outlook's older data format. Does anyone know about this topic??