For those who already are using Lync On Premises, they may already know the Lync Web Scheduler.
As a reminder, or to explain what is if for those who don’t know, 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.
The good news is this works also for Office 365 users
To reach the LWS for Office 365, just connect to https://sched.lync.com
You can get more about LWS at http://office.microsoft.com/en-us/communicator-help/lync-online-web-scheduler-HA102756689.aspx