Domain Server - Domain User Login Fail

VM forest at Softlayer ::  Win Server 2012 R2  ::   DC, SQL Server and RDS Server.  Joined SQL and RDS to DC no problem but cannot login as domain administrator or domain user, only as local admin.  Both servers show as computers in the DC management snap-in.  Both servers have the DC as first DNS entry.  Can ping both ways and login to browse files on DC after login prompt credentials are entered.  Cannot add domain user to either machine.  Error at end is that DC cannot be contacted.  Network discovery is on for all machines and firewalls off.  Using Private Net for LAN comm.
jdfullerAsked:
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Jason CrawfordTransport NinjaCommented:
Have all servers been rebooted since joining the domain?
Zac HarrisSystems Administrator Commented:
You might have done this but make sure you are actually logging into the domain on the client PC.

At the login screen if you have a username and password box make sure it shows you are logging into the domain. A sure way is to put the name of the domain in the username field   (domain\username) and enter the password.

If your Group Policy is set to remember last login (not recommended for security reasons) you may have to do a switch user. This is usually not the case though.
jdfullerAuthor Commented:
All servers have been rebooted and yes I am aware fo the domain user syntax.  I cannot login as the domain admin even though it joined the domain with no issue.
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jdfullerAuthor Commented:
It turned out that having two NICs provisioned by the host confused the DNS.  Reconfiguring the NIC to use only the DC for DNS through the private Network connection and disabling the public connection worked.  I access the desktops of the other machines through RDP while on the one machine that has access to the Internet.

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Zac HarrisSystems Administrator Commented:
Just a suggestion, in the future it would be helpful to mention that there were two NICs. Glad you figured it out though.
Zac HarrisSystems Administrator Commented:
Also in the future, keep in mind that all experts on here are not compensated in any way and should not be expected to provide you with answers to your question in any timeframe. If you are in a crunch and not willing to wait for a response please feel free to seek alternate methods of support.
jdfullerAuthor Commented:
Totally understood.  Been in EE for years.  I get that.  Not expected but I wanted to close the question with a result so it didn't stay open or unattended.
jdfullerAuthor Commented:
Two replies right away were not the solution. 24 hours later, no more replies and I figured it out.
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Windows Server 2012

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