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PrepareSchema Failed while upgrading Exchange Servers
/PrepareSchema Failed while upgrading Exchange Server 2013
Error : Setup needs to contact the Active Directory schema master, but this computer isn’t in the same Active Directory site as the schema master (Admin) exchange server 2013
Checked the Number of Domain Controllers
Checked the FSMO Roles pointed to Domain Controller
WorkAround :
1: Either this can be done adding the Registry “String Value” as DefaultSite” Or
2: Moving the FSMO roles to the Domain Controller Exchange server is pointed to
Here we will execute on 2nd work around
Moving the Schema Role to the Domain Controller Exchange Server is Connected to…
For checking you can either try from command or go to Network control panel (ncpa.cpl)
From Command prompt
Query for Domain in the environment
Command : netdom query dc (you will see list of Domain controllers)
Now do nslookup for the Domain Controller Exchange server is connected to
Post confirmation try pinging the server IP with switch -a
Switch -a while pinging will give the name and the ping status
Ping -a “Ipaddress”
Now Moving the FSMO Role (Schema ) to the Domain Controller Exchange Server is connected to…
For that you need to run the command
NTDSUTIL.EXE
What is NTDSUTIL:
Ntdsutil.exe is a command-line tool that provides management facilities for Active Directory Domain Services (AD DS) and Active Directory Lightweight Directory Services (AD LDS). You can use the ntdsutil commands to perform database maintenance of AD DS, manage and control single master operations, and remove metadata left behind by domain controllers that were removed from the network without being properly uninstalled.
Note: This tool is intended for use by experienced administrators…..
Steps to move Schema Role from One Domain to another Domain
Open Command Prompt as “RunasAdministrator”
Type ntdsutil
Mention Role as shown below
Enter
FSMO Maintenance : Connections
Enter
Now mention the Domain Controller to want to Move
This will Bind the Domain Controller to are trying to connect
This will connect with local user account, then you need to come out of the Connections
Quit -> Enter
Now Type the Role you are trying to move
This will prompt “Are you sure you want the role of Schema Master transferred to the server – Server Name”
Click YES
After moving you need to Quit from FSMO Maintenance
And Quit ntdsutil as shown below:
For Confirming either you can check querying list of fsmo using the command “netdom query fsmo”
Proceed Installing Exchange Server.
Post completion move the Role, back to Domain Controller which it is earlier pointed to…
Roll Back FSMO Role….
Below is the process for verifying in the adsiedit to check if the exchange server installed properly
Connect to ADSIEDIT
Right click and click connect to Schema under
Click Connect and “Select a well known Naming Context” -> dropdown select -> Schema Partition as shown below:
Now you will see the Schema with Domain Name -> Expand
Now go to the Attribute “CN=ms-Exch-Schema-Version-Pt” on the right side of the page
Right Click -> Properties
Under Attribute Editor -> Under Attribute Editor select range upper
Note: If you are getting Null Value then select Filter and click “Show only Attributes that have values” so that you can see the values with attributes.
Under the Attribute Editor select “Range Upper” the value for Exchange 2013 should show the value – 15312 as shown below:
Thanks,
Praveen Kumar
MCP, MCSA, MCTS, MCITP | Windows Server & Exchange Server
Publisher @ Techrid.com