Hello,

I configured a lync server 2013 enterprise edition on sub domain. But, users can not sign in. 

Error: "You didn't get signed in. It might be your sign-in address or logon credentials, so try those again. If that doesn't work, contact your support team."

I checked clock/language/region settings. They are same with the child domain controller. 

I uninstalled and installed again the lync client. But problem continues. 

What is the problem? 

Result of Lync Connectivity Analyzer:

The credentials were not authorized by the server. Please verify your login credentials and try again.
Couldn't connect to URL https://lync.child.contoso.com/WebTicket/WebTicketService.svc/Auth
Ms-Diagnostics-Fault ErrorId: 28000, Reason: User is not SIP enabled.
Reason: Internal server error (HTTP status code 500)
Server discovery failed for secured internal channel against https://lyncdiscoverinternal.contoso.com/

Starting automatic discovery for secure (HTTPS) internal channel

• Edited by kircay Thursday, March 26, 2015 5:56 PM

I tried these steps

I disable a user, and then i run this command "Set-CsUserReplicatorConfiguration -Identity global -ADDomainNamingContextList $Null" and updated csuser database and again enabled the csuser but problem continues. Users can not login. 

I also get this error:

PS C:\Users\contoso> Test-CsRegistration -TargetFqdn pool.child.contoso.com -UserSipAddress "sip:testuser@contoso.com"

Target Fqdn   : pool.child.contoso.com
Result        : Failure
Latency       : 00:00:00
Error Message : 404, Not Found

Diagnosis     : ErrorCode=1003,Source=fe1.child.contoso.com,Reason=User does not
                exist,destination=contoso.com
                Microsoft.Rtc.Signaling.DiagnosticHeader

• Edited by kircay Friday, March 27, 2015 10:00 AM

get-csuser works for this user?

All attributes are set for this users on the AD attributes?

The Lync FE eventlog shows no errors?

If you run Get-CsAdDomain -Domain domain1.contoso.net -GlobalSettingsDomainController dc01.domain1.contoso domain state is

Solution was extremely weird. 

When run this command "Enable-CsAdDomain -Domain child.contoso.com" 

problem was solved. But i remember i run this command before.