Office 365: Troubleshooting Audio-Video Connection and Quality in Microsoft Lync Online

This video shows you how to troubleshoot issues with choppy, tinny, or delayed audio; errors when you try to start audio or video in a one-to-one or group conference; and issues with Lync Online caused by your on-premise firewall. 

Microsoft Office 365: User Training Videos

The Office 365 overview tour.

Email and other features.

Collaborate with SharePoint Online.

Learn about how Microsoft Office applications and Office Web Apps work together and with Office 365.

Microsoft Lync. Learn about how Lync 2010 helps you send instant messages (IM), talk, and share your desktop.