Sign in with the account you use for SkyDrive, Xbox LIVE, Outlook.com, or other Microsoft services.
Sign in with the account provided by your work or school to use with Office 365 or other Microsoft services.
Office 365 includes Lync, which lets you have instant messaging (IM), audio and video conversations, and Lync Meetings. To download Lync, sign in to Office 365, then at the top of the page, click Settings > Office 365 settings > Software > Lync.
With Lync you can: