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change AD domain name

Below is my environment

2008 R2 DC1 : John.com - Primary DC
2008R2 DC2 : John.com - Secondary dc
2007 Exchange server : john.com

Now i need to change my domain from John.com to Mike.com

what will be the suggestion?
Should i need to cross forest migration from John.com to mike.com or I can change the domain name ?
Once I will change the domain need I need to migrate all mailboxes from John.com to mike.com in office 365.
and I need to remove john.com from my whole environment.

What will be the best practices? Kindly suggest...

Systech Admin

Refer http://technet.microsoft.com/en-us/library/cc816848(v=ws.10).aspx

SOLUTION

Mahesh

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rigelnet

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IF I will add the mike.com as accepted domain and add smtp of mike.com then I can migrate my mailboxes from exchange 2007 to office 365 portal in which i have register mike.com domain. After that my emails will work fine from the office 365.

Then I need to configure directory sync between my AD and office 365 to sync the domain passwords. How is it possible? because still my all the users are in john.com and all client system are member of john.com.

Kindly suggest...

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