Now you can use your Macs with Microsoft Online Services, using new “Mac Sign-In” application that provide Mac users with same “single-sign-in” functionality provided to PC users. After installing and signing-in, you can send and receive Exchange Online e-mail and access SharePoint Online sites from your Mac without having to sign-in multiple times. This app’ll also configure Entourage to connect to your Exchange Online mailbox. To get an early look at Mac Sign-In app, register via Microsoft Connect site using this Invitation ID: MAC-Y689-6QBR.