CONVERT EXCHANGE 2010 DISTRIBUTION GROUP TO SHARED MAILBOX

I can you provide instructions on how to convert exchange 2010 distribution group to shared mailbox. I also need to know how to create an x500 address.
RaphaelCAAsked:
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Jason CrawfordTransport NinjaCommented:
1. First gather and document the legacyExchangeDn value of the Distribution Group (DG) you want to convert:

Get-DistributionGroup <group email address> | fl legacyexchangedn

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2. Assuming you want all current members of the group to have access to the shared mailbox you will create, export the member list of the group and cache in the $users variable:

$users = Get-DistributionGroupMember <group email address>
$users.primarysmtpaddress | Out-File users.txt

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3. After verifying the contents of users.txt is correct, delete the Distribution Group:

Remove-DistributionGroup <group email address> -Confirm:$false

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4. Without closing Exchange Mangement Shell, create a new shared mailbox using EMC or EMS (I assume you know how to do this part).

5. In the same EMS session you were working from previously, run this command:

foreach ($user in $users) {
    Add-MailboxPermission <shared mailbox email address> -User $user.primarysmtpaddress -AccessRights fullaccess
}

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6. If you accidentally closed the EMS session that had the $users variable, run this command instead:

foreach ($user in (Get-Content users.txt)) {
    Add-MailboxPermission <shared mailbox email address> -User $user -AccessRights fullaccess
}

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7. Save the legacyExchangeDn value saved in step 1 as an x500 proxy for the shared mailbox to maintain internal routing:

Set-Mailbox <shared mailbox email address> -EmailAddresses @{add='x500:insertlegacyexchangedn'}

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RaphaelCAAuthor Commented:
In Step 2 the users.txt is empty. Is this normal?
RaphaelCAAuthor Commented:
[PS] C:\Windows\system32>    Add-MailboxPermission SurfaceLEC@allynintl.com -User $user.primarysmtpaddress -AccessRights  fullaccess
Cannot bind argument to parameter 'User' because it is null.
    + CategoryInfo          : InvalidData: (:) [Add-MailboxPermission], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Add-MailboxPermission

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RaphaelCAAuthor Commented:
Yes please close it. Thank so very much Jason for your help.
RaphaelCAAuthor Commented:
The solution performed satisfactory. I could not use all the commands  I used what I could to get the result I wanted.
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