Lync for Android or iOS not able to sign in? But Lync client works?
January 3rd, 2013 by 
Jabez Gan [MVP]
Background:
Lync for Android and iOS were launched recently. However, automatic sign in does not work for Lync/Lync Online (Office365).
Problem:
Using Lync client on PC and Mac, it signs in fine; however, when trying to sign onto Lync using Lync Server or Lync Online, it fails to sign on.
Solution:
As part of setting up the domain in Office365, it is missing a few CNAME records for Lync.
Add the following 2 more CNAME records into the DNS of your domain:
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