Creating a Lync meeting not working in outlook 210 client

Question

We use office 365 environment and pushed lync 2013 client to user who uses Outlook 2010 Client still. Anyway the default domain work address the user is able to go to calendar, click new meeting button and fill out the meeting email then click LYNC Meeting,
which works, but when he adds another domain email account in his outlook and tries doing that, he gets an error "The request failed. Please try again. Make sure that you are signed in to Microsoft Lync" in which he is signed in.
I deleted sip, reinstalled Lync 2013, redid the outlook profile, not sure what is triggering this. His other domain account uses Office 365.
Any ideas?
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Answer 1

Correction:
The error happens when he sends a lync meeting to his own second domain or anyone within the domain.
So he has two email addresses in outlook
1  domain 1  (default) which he connects to Lync with this and this is our domain
2 domain 2 this is his other domain email address in which he added to Outlook.
So when he goes on domain 1 calendar and creates a meeting and licks on New Lync meeting to someone in Domain 2 that is when Outlook throws an error that he is not signed into Lync in which he is.  It;s odd.
Sorry for the confusion.
Funny thing is when he removes Domain 2 email account, lync meetings work fine to send. So something with domain 2 email address added to his outlook is triggering this.
Best regards,<br/> <br/> <strong>Joe C<br/> </strong>Partner Online Technical Community<br/> -----------------------------------------------------------------------------------------<br/> We hope you get value
from our new forums platform! Tell us what you think:<br/> <a href="http://social.microsoft.com/Forums/en-US/partnerfdbk/threads"><span style="color:#0033cc">http://social.microsoft.com/Forums/en-US/partnerfdbk/threads<br/>
</span></a>------------------------------------------------------------------------------------------<br/> This posting is provided &quot;AS IS&quot; with no warranties, and confers no rights <hr>