Office 365 Lync 2013 issue

Hello, I recently added another domain to my office 365 account for a new group of people and I've made the necessary changes with GoDaddy and on the 365 portal. Lync signin works perfectly fine outside of my organization, but users on 2013 Lync cannot signin internally. They receive a DNS error. What's odd is that all Lync 2010 clients work fine internally and externally. Here is the log error from one of the 2013 clients:

1 Login: FAIL (hr = 0x80ee0066)

signin to, internal
VerifyOnEnableEvent result return 10

Another odd thing is that if I right-click Lync 2013 and select run as with new credentials and I use the local admin credentials of the PC, it works. All of my users are local admins to their PC.

I have a ticket open with MS, but they're not making much progress. My current 365 domain works fine, so I don't think it could be a major internal DNS issue. Any help would be greatly appreciated.
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JharrisonsnbsConnect With a Mentor Author Commented:
Was able to resolve the issue. It turns out that years ago the domain was a Single-Level and we had to go into AD Forrests and add the new domain there and 2013 clients worked fine.
Vasil Michev (MVP)Commented:
Probably the good old "member of too many groups" issue. Do you have AD FS? If so, here is your issue:

In any case, enable logging for the Sign In Assistant to troubleshoot this:
JharrisonsnbsAuthor Commented:
Hi vasilcho,

  No, we are not using AD FS. I will enable the logging and replicate the issue.
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Vasil Michev (MVP)Commented:
Well, do the standard staff then:

1) delete the local profile and recreate it
2) use manual server settings (
3) run MOSDAL to collect additional logs
4) try also the (a bit annoying) Lync Online Sign-in Guided Walkthrough:;en;3695&showpage=1
JharrisonsnbsAuthor Commented:
Here are the trace logs.
JharrisonsnbsAuthor Commented:
Single Level domain issue
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