Lync Client Requirements and Limitations
Applies to: Office 365 Deployment Guide for Enterprises
Topic Last Modified: 2012-09-28
The following Lync Online clients can be used with Office 365:
- Microsoft Lync 2010 client. Users must install the Lync 2010 client to use all of the Lync Online features. A promotional version of Lync 2010 client can be downloaded from the Microsoft Online Services Portal download page.
- Lync for Mac 2011. Lync for Mac 2011 offers Mac users integrated functionality for presence, instant messaging (IM), conferencing, and voice. It is designed to work with both Lync Server 2010 and Lync Online.
- Outlook Web App. The web-based Outlook Web App client provides Lync Online IM and presence features to users.
- Lync Web App. The web-based Lync Web App client experience enables IM in meetings, high-fidelity desktop, application and presentation viewing, desktop sharing, whiteboard, lobby, and presenter access controls. In addition, the web client supports phone dial-out after joining the meeting, which requires a third-party dial-in audio conferencing service. For more information on third-party audio conferencing, see the Help article Configure dial-in conferencing.
- Lync 2010 Attendee. This client allows external or anonymous users join a scheduled online meeting with full fidelity PC-audio, video, and data sharing. Lync 2010 Attendee doesn’t require administrator privileges or the installation of Microsoft Silverlight, so it can be downloaded and installed on a per-user basis, or deployed ahead of time to external users who require it.
- Lync mobile clients. Lync 2010 mobile clients bring presence, IM, and the voice capabilities of Lync to your mobile device. With Lync 2010 on your mobile device, you can choose from multiple ways to communicate with others, including IM, or calling using either your work or mobile number. Supported mobile platforms include Windows Phone, iPhone, iPad, Symbian, and Android. For details, see the Mobile Client Comparison Tables.
- Lync Online Web Scheduler. 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. For details, see Lync Online Web Scheduler.
The Microsoft Office Communicator 2007 client and other instant messaging program clients cannot be used to connect to Lync Online.
For more information about supported Lync devices, see the TechNet article Phones and Devices Qualified for Microsoft Lync.
The Lync 2010 client typically uses TCP port 5061 for network communications in an on-premises environment. However, after the client is configured for Lync Online, it uses TCP port 443. Port 443 is a more commonly available port on customer firewalls, routers, and proxy devices. Lync Online also uses TCP port 5223 for Lync mobile push notifications.
See the Required Ports section of Appendix C Key Deployment URLS, Ports, and IP Addresses for details on ports and IP ranges for Lync Online and the Network Device Considerations topic for more information.