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Actually, I misunderstand the request and I am going to send another question and grant point to this question. &nbsp;<br />
<br />
Thanks for your help!!!
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Actually, I misunderstand the request and I am going to send another question and grant point to this question.  

Thanks for your help!!!

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We created a mail user under Mail Contact in EMC for a user whose mailbox is in his own company. &nbsp;Doing this step also created his account in our Active Directory.<br />
<br />
What is the best way to bring his mailbox into our mailbox server with minimal impact to the user? &nbsp;I am thinking the below steps and want to run by someone who has done this before:<br />
<br />
0. Export his mailbox to some PST file. <br />
1. Go to Mail Contact in EMC and delete his mail contact. &nbsp;This should keep his account in AD, right?<br />
2. Create a new mailbox and link it to his AD account.<br />
3. Schedule a downtime, and open up Outlook and import his mails from the PST file to the new mailbox in our mailbox server. <br />
<br />
Thanks,
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We created a mail user under Mail Contact in EMC for a user whose mailbox is in his own company.  Doing this step also created his account in our Active Directory.

What is the best way to bring his mailbox into our mailbox server with minimal impact to the user?  I am thinking the below steps and want to run by someone who has done this before:

0. Export his mailbox to some PST file. 
1. Go to Mail Contact in EMC and delete his mail contact.  This should keep his account in AD, right?
2. Create a new mailbox and link it to his AD account.
3. Schedule a downtime, and open up Outlook and import his mails from the PST file to the new mailbox in our mailbox server. 

Thanks,

Exchange 2010 Mail Contact Mail user

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.