Symptoms
Consider the following scenario. You add Windows Live, MSN, or Windows Live Hotmail contacts to a Microsoft Lync Online user’s contact list. To do this, you use an E-mail As Sign-In (EASI) ID domain instead of a default @live.com address. In this scenario, you may experience the following issues:
Presence is unavailable, and the status is displayed as Presence Unknown.
Instant messages cannot be delivered or sent.
In the following sections, the following domains are used as placeholder examples:
Lync Online domain: contoso.com
Windows Live EASI domain: live-contoso.com
Cause
Public Internet Connectivity (PIC) in Lync Online supports Windows Live, MSN, and Windows Live Hotmail. However, when you add PIC contacts that use a Windows Live EASI domain such as live-contoso.com, Lync Online cannot resolve the IM Federation server based on the domain suffix.
If you directly add a PIC contact by using the contact’s EASI ID (for example, you use JoeAndreshak.@live-contoso.com), a specific Service (SRV) record is required in the Domain Name System (DNS) for live-contoso.com. This SRV record is required because the Lync Online server uses the domain suffix in the user's EASI ID. In this example, the Lync Online server tries to use the live-contoso.com domain suffix. The Lync Online server tries to identify an SRV record that points to the Instant Messaging (IM) federation server for the domain.
Resolution
To resolve this issue, use one of the following methods.
Method 1
Use the EASI Windows Live ID together with PIC when you add a user to your Lync 2010 contact list. To do this, you must make a change in the search field. A Lync Online user who wants to add the EASI Windows Live ID, such as <username>@live-contoso.com, must add an address that resembles the following to the search field:
JoeAndreshak(live-contoso.com)@msn.com
This method allows for a quick resolution if Lync Online users are only going to add a few PIC contacts.
Method 2
The Lync Online administrator must add the correct SRV Federation records to the DNS host for the Lync Online environment. The Windows Live EASI domain owner must also add an SRV record that resembles the following example to the DNS host for the Windows Live EASI environment:
_sipfederationtls._tcp.live-contoso.com
port = 5061
server hostname = federation.messenger.msn.com
Administrators can let Lync Online users add contacts without having to use the special format in "Method 1" in the "Resolution" section. To do this, administrators must add an SRV Federation record that Lync Online users can access to add contacts to the Windows Live EASI domain.
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