Someone has accidentally created a 'New Mail User' in Exchange 2007. This create an AD account however, we are unable to send email to the user. The user has been logging into the AD and using resources, and I would like to do this without losing his SID - aka i don't want to delete his account and re-create it correctly. How can I convert his 'Recipient Type Details' from a 'Mail User' to a 'User Mailbox' (Regular user) I ran the following from the Exchange shell:Set-Mailbox "UserLastName, UserFirstName" -Type Rgularand received the following output."Set-Mailbox : UserLastName, UserFirstName is not a ailbox user.In AD - it shows an SMTP address for the user, however they have no 'Mailbox Features' tab. How canconvert his 'Recipient Type Details' from a 'Mail User' to a 'User Mailbox' (Regular user)?Any help is appreciated.ZachZach Smith

Hi Zach,Did you try by enabling the mailbox with Enable-Mailbox cmdlet for the user? Specify the database to create a mailbox...Enable-Mailboxhttp://technet.microsoft.com/en-us/library/aa998251.aspxAmit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com

I might make a test user and see if that works - however did just moments ago find a fix - right-click the account and select 'Disable' This will delete all Exchange Attributes and not delete the AD account. Then I can do a 'New Maibox' and add this existing user.Thanks!Zach.Zach Smith

Creating mailbox for an existing user runs internally powershell Enable-Mailbox cmdlet :)Thanks for sharing your solution here...Amit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com

Does the solution mean that in powershell a Disable-MailUser must be run before Enable-Mailbox or else it will not be possible to conver a MailUser to UserMailbox? Thanks Anu MelkoteAnu

On Sat, 28 Aug 2010 03:53:56 +0000, Anu Melkote wrote: >Does the solution mean that in powershell a Disable-MailUser must be run before Enable-Mailbox or else it will not be possible to conver a MailUser to UserMailbox? There's no easy way to do this. You have to preserve whatever property values you've set on the mail-enabled user and reapply those to the mailbox-enabled user. Things like CustomAttributes, whether the user is excluded from automatic application of address policies, whether the user appears in the GAL, etc. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

(This goes the other way) Converting a Mailbox to a MailUser (and not losing attributes) Mike Crowley Check out My Blog!

In Exchange 2010 just type Get-MailUser name | Enable-Mailbox and it is all done for you.Brian Reid C7 Solutions Ltd (www.c7solutions.com)

Thanks BrianReid, this made it easy. nhhr

Tnx Brian!!! This makes it a lot easyer, since we were first trying to do this via a script (and removing certain attributes)