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How to Migrate Users Across Forest (Cross Forest) Using ADMT 3.2 with SID and Passwords

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Once Trust is in place

Open Administrators Group in the Source Forest , Add Administrator of the Target Forest to acquire proper Permissions

Vice Versa

Open Administrators Group in the Target Forest , Add Administrator of the Source Forest to acquire proper Permissions

otherwise you will end up with Access denied errors while Moving Users back and forth

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Once permission part is done

We have to configure a Password Export Server in the source domain to allow exporting the passwords to the Target domain 

If your Source Domain DC is running a 64 bit Version

Password Export Server version 3.1 (x64)

If your Source Domain DC is running a 32 bit Version

Password Export Server version 3.1 (x86) 

Choose Next

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Before you choose next , We need to create a password Encryption file from the Target Domain 

Reference –

Enabling Migration of Passwords

http://technet.microsoft.com/en-us/library/cc974435(v=ws.10).aspx 

Open a Command Prompt where ADMT is installed on the Target Domain , Run the Below Command to Create a .pes file

admt key /option:create /sourcedomain:<SourceDomain> /keyfile:<KeyFilePath>

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Once the File is Created on the Target Domain , Bring the File to the Source domain and Browse for the file 

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Click Finish 

Reboot the Server to complete the installation 

Start the “Password Export Server Service” 

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 Now Open ADMT , Choose User Account Migration Wizard

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Choose Source Domain and Target domain

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Now Select users

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Choose the Target OU 

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Choose Migrate Passwords 

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Choose Target Same as source

Choose Migrate User SIDS to Target Domain 

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Type User name and Password of the Source domain 

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Choose Next 

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Choose Next 

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Choose Next 

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Great !! 

Now Users with SID and Password have been migrated across forest (Cross forest) Successfully 

Regards

Satheshwaran Manoharan