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Setting up Lync 2010 with 2 domains

Here's my situation. I need to deploy Lync 2010 and before I do I need to clarify an issue I know I will encounter. Due to a recent acquisition, our internal AD domain is domain1.com while our email is hosted Office 365 Exchange with otherdomain.com as the email address.

At this time, due to a custom application heavily in use, I can't change our internal AD domain to otherdomain.com and must remain as domain1.com. However, I need Lync to use the otherdomain.com.

Is there a way to login to Lync (internally - not hosted) using the otherdomain.com while sitting on the domain1.com network? I could create a domain internally just for the Lync server to match otherdomain.com, but it would be best if we could somehow have single sign-in between Office 365 and the Lync server or between the domain1.com AD and the Lync server.

Any help would be appreciated.
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Bill Welsh
Asked:
Bill Welsh
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1 Solution
 
Leon FesterCommented:
Can be done, check this thread on the Office 365 forums:
http://community.office365.com/en-us/forums/162/t/13702.aspx
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Leon FesterCommented:
Found other article, check the list of links at the end
http://social.technet.microsoft.com/wiki/contents/articles/10119.wiki-lync-server-2010-features-and-how-to-configure-them.aspx

Links from the above-mentioned article.
•How to enable Lync On-Premise to Federate with Office365 Lync Online: http://techietom.co.uk/blog/2011/04/how-to-enable-office365-lync-online-to-federate-with-lync-on-prem/   
•Federation 101 in Lync Online: http://www.ultimate-communications.com/2011/07/federation-101-in-lync-online-office365-lync/   
•Configuring On-Premises Lync Server 2010 Integration with Exchange Online: http://blogs.technet.com/b/nexthop/archive/2011/06/28/configuring-on-premises-lync-server-2010-integration-with-exchange-online.aspx   
•Using Lync Mobile with Office 365 and Lync Online: http://msunified.net/2011/12/12/using-lync-mobile-with-office-365-and-lync-online/   
•Handy PowerShell Administration Script for Office 365: http://blog.insidelync.com/2011/09/handy-powershell-administration-script-for-office-365-2/   
•How to troubleshoot Lync Online using Lync Server Resource Kit Tools & Snooper v4 http://www.ultimate-communications.com/2011/06/how-to-troubleshoot-lync-online-using-lync-server-resource-kit-tools-snooper-v4/
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