Now that the Lync Mobile Client is released it is important to enable your Office 365 Lync Online domain to support these clients. This blog post will specify what you need to do

Lync Mobile features

Lync mobile client is released for Windows Phone 7, iPhone, iPad, Android and later on Nokia (Symbian). The feature set is about the same accross the platforms. There is no ability to view meeting content, video or do voice over IP. The main features is therefore

• IM and presence
• One Click join meetings (Requires audio conferencing provider)
• View contacts

For a detailed feature list see the TechNet article: http://technet.microsoft.com/en-us/library/hh691004.aspx

Enable your domain for Lync Mobile automatic discovery

• Create a CNAME with you domain called lyncdiscover.yourdomain.com and point it to webdir.online.lync.com
• If you use the .onmicrosoft.com domain, take a look at this guide on how to connect by Ben Lee: http://www.bibble-it.com/2011/12/12/office-365-basic-plans-quick-config-for-lync-mobile

When using Lync Mobile over WiFi make sure you check the following

• Open outbound port in firewall to TCP 5223 for Apple push notification
• If you firewall proxy settings blocks SRV queries add
• CNAME with your domain called lyncdiscover.yourdomain.com and point it to webdir.online.lync.com to your internal DNS

Thats is. Should be a simple process. In order for this to work you need to have published the Lync Online service as depicted in this kb article: http://support.microsoft.com/kb/2566790

References

Set up Lync mobile devices: http://community.office365.com/en-us/w/lync/1040.aspx
Deploying Lync Mobile Clients: http://technet.microsoft.com/en-us/library/hh691005.aspx
Ensuring Your Network Works With Lync Online: http://community.office365.com/en-us/w/lync/ensuring-your-network-works-with-lync-online.aspx