Can't reach global catalog server.....that I am actively pinging....

Hello.
Background
I have a Window server 2008 r2 installation that I fell in on. I removed all roles and features. Renamed, and gave a new ip address
I ran DCpromo and installed AD and DNS. this server was to be the first in a new domain.
After successfully creating the domain, I added my workstation (laptop) to the domain successfully and logged on with a created domain administrator account.
I installed the remote administrator pack for windows 7 onto my workstation 
Problem
I ran AD Users and Computers (from my workstation) and proceeded to create a user... only to be told:
"Windows cannot verify that the user name is unique because the following error occurred while contacting the global catalog: The server is not operational."
Troubleshooting steps taken so far:
I have ensured that my workstation and server times match (to the second)
I have ensure they are in the same time zone, date, etc.
I am actively pinging the domain controller from my workstation WHILE I attempt to create the user, so network connectivity is ruled out. they are in the same subdomain, there is no router in between. it is workstation > switch > switch > switch
> server
I checked sites and services, to find only 1 server listed for the sole domain, and it IS checked as the global catalog server
My workstation when added to the domain registered in DNS appropriately. As is the domain controller itself.
DCDIAG /fix reports no errors, everything passes
metadata.cleanup cannot be used because there are not other domains or sites, or servers listed beside the one I created.
Please help....Thank you.

Please use dcdiag /v and repadmin /showreps
to check the DCs health status and AD replication.
Please also refer to the recommendations mentioned here: http://social.technet.microsoft.com/wiki/contents/articles/18513.active-directory-replication-issues-basic-troubleshooting-steps-single-ad-domain-in-a-single-ad-forest.aspx
This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.
Get Active Directory User Last Logon
Create an Active Directory test domain similar to the production one
Management of test accounts in an Active Directory production domain - Part I
Management of test accounts in an Active Directory production domain - Part II
Management of test accounts in an Active Directory production domain - Part III
Reset Active Directory user password

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    VERBOSE: [15:49:52.489 GMT] 
    Get-RemoteMailbox : Runspace context: Executing
    user: , 
    Executing user organization: , 
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    VERBOSE: [15:49:52.489 GMT] Get-RemoteMailbox : Beginning processing
    VERBOSE: [15:49:52.521 GMT] Get-RemoteMailbox : Current ScopeSet is: {
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    Exclusive Configuration Scope(s): {} }
    VERBOSE: [15:49:52.521 GMT] Get-RemoteMailbox : Resolved current organization: .
    VERBOSE: [15:49:52.521 GMT] Get-RemoteMailbox : Searching objects "abose" of type "ADUser" under the root "$null".
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    + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo : NotSpecified: (:) [Get-RemoteMailbox], ADTransientException
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    Thanks for any help

    looks to me permission error as when you are running it via a schedule task is is not able to call exchange shell/ commands {confirm this} where as when you running this manually looks to me you open exchange shell, may be as admin also and then running
    the script.
    schedule task process is not able to get the permission..
    MARK AS USEFUL/ANSWER IF IT DID
    Thanks
    Happiness Always
    Jatin

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    When the first domain controller is installed on the network by default it becomes the global catalog server, when you install the additional domain controllers then you will have to manually specify the global catalog server in case if you want.
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    http://technet.microsoft.com/en-us/library/cc728188(v=ws.10).aspx
    http://www.arabitpro.com

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    exchange 2007 connects with 2 global catalog servers
    when it connects GC server A, and A is down, there is user connection error at Outlook side.
    any setting to allow Exchange 2007 immediately switching to GC server B without waiting?
    Thanks a lot.

    Hi
    As per the information and details provided by you, please follow these steps: -
    If you are running a version of Exchange Server that is earlier than Exchange Server 2010, use the following steps to force Outlook to identify and use the closest global
    catalog server yourself.
    Click
    Start, and then click Run.
    In the
    Open box, type regedit.exe, and then click
    OK.
    Locate and then click the following key in the registry:
    HKEY_CURRENT_USER\Software\Microsoft\Exchange\Exchange Provider
    On the
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    Value name: Closest GC
    Data Type: REG_DWORD
    Radix: Hexadecimal
    Value Data: 0x0000000
    Quit
    Registry Editor.
    I hope this information will be helpful for you.
    Thanks and regards
    Shweta@G 

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