how to I assign an existing mailbox to a new user in Exchange 2010

I had a users profile get corrupted and I couldn't repair it.  I created a new one with a different login name.  How do I assign the old mailbox to this user.  Also I how do I give him an email address?  When I open the new user in AD, there is no email addresses tab.
J.R. SitmanIT DirectorAsked:
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Exchange_GeekCommented:
Well, it seems you read uptil Exchange 2003 for managing mailboxes. Microsoft tricked you for mailbox assignment. They've stopped dependancy on creation of mailboxes using ADUC anymore. All mailbox related tasks are taken care by Exchange Console.

so, in you're case - if you want to assign the mailbox to an existing user - you'll need to remove association of the mailbox with its original user by following the steps listed below.

Goto Start - Programs - Microsoft Exchange - Exchange Management Console - Recipients - Mailboxes - Search for the mailbox which is in question - Right click - REMEMBER: Click only on Disable.

DO not close the console yet.

Next Goto Start - Programs - Microsoft Exchange - Exchange Powershell.

Type Get-MailboxDatabase | Clean-MailboxDatabase

Next, open minimized Exchange Management Console.

Goto Recipients - Disconnected Mailboxes - Click on Connect to Server "Select your Exchange Mailbox Server". - Search for the disconnected mailbox - Click on Reconnect - Search for the new user account - click Finish.

Voila !!!

Regards,
Exchange_Geek

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J.R. SitmanIT DirectorAuthor Commented:
I'll do this tonight after the user has gone for the day and then post the results.

Thanks
Exchange_GeekCommented:
Perfect

Regards,
Exchange_Geek
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S_K_SCommented:
Please make note of the options Disable and Remove. Though Exchange_Geek has made it very clear that you need to use the Disable option still of letting you know the difference between the two.

Be careful with this. It's better safe than sorry.

In the Exchange Management Console when a mailbox is selected the actions pane shows two tasks; Disable and Remove.

Exchange 2010 mailbox tasks: Disable and Remove
These two tasks do the following:
Disable will remove the Exchange attributes for the user account but leave the user account in Active Directory.  The mailbox is then also left in the Exchange mailbox database until the retention period has lapsed, then it is removed permanently.
Remove will remove both the Exchange mailbox and the user account from Active Directory

Unfortunately some admins wrongly assume that Disable is for temporarily disabling mailboxes, and that Remove will only remove the mailbox and not the user account.
If you’re having trouble remember the correct usage of these tasks think about it in terms of the Exchange Management Shell commands and how they pair up.
Enable-Mailbox is for creating a mailbox for an existing user, and Disable-Mailbox removes only the Exchange attributes from the user account
New-Mailbox is for creating a new AD user and mailbox at the same time, and Remove-Mailbox removes both the mailbox and the user object.
But if thats too hard just to try to remember that Disable is the safest option, because you can quickly reconnect the mailbox to the user again if it is still within the retention period.

Refer:
http://exchangeserverpro.com/exchange-2010-difference-between-remove-and-disable-mailbox
J.R. SitmanIT DirectorAuthor Commented:
Thanks, S_K_S
Exchange_GeekCommented:
Bottom line - DO NOT USE REMOVE option :)

Regards,
Exchange_Geek
J.R. SitmanIT DirectorAuthor Commented:
I think I get it.  JK
J.R. SitmanIT DirectorAuthor Commented:
worked perfect.

Thanks
Kernel_Recovery_ToolsCommented:
What exchange version do u have?

This is for Ex2007/2010

1. Disable the existing mailbox using EMC->Recipient Configuration

now this disabled mailbox will appear in EMC->Disconnected Mailbox

2. Enable the disabled mailbox using Connect button on right Action page, which will initiate a new wizard. There you will have to connect this mailbox with the 2nd user.
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