Microsoft Lync Online Web Scheduler is a web-based meeting scheduling and management tool for users who don’t have access to Microsoft Outlook, or are on an operating system not based on Windows. With Lync Online Web Scheduler, you can create new meetings, modify your existing meetings, and send invitations using your favorite email program.

Microsoft Lync Online Web Scheduler is only available for Office 365 users with appropriate subscriptions active.

More information:

http://office.microsoft.com/en-us/communicator-help/lync-online-web-scheduler-HA102756689.aspx

To access the online scheduler: https://sched.lync.com