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Does anyone know the PS command to add an individual user mailbox to a Dynamic Distribution Group?

Posted on 2015-02-17
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We have a number of Dynamic Distribution groups based on office location (e.g 'Everyone London') but occasionally need to add an individual from another office. In Exchange 2010 this does not seem possible through the EMC so does anyone know the correct PS command?
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Question by:paulrixon
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by:VB ITS
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I don't think it's possible to add a user to a Dynamic Distribution Group. The group membership for DDG's are determined each time an email is sent to the group.

Second paragraph in this Technet article will confirm this: https://technet.microsoft.com/en-us/library/bb123722(v=exchg.141).aspx

You'll need to either set the attribute which determines the membership of the DDG on the user's account at the time you want them to be included in the group emails or modify the recipient filter of the DDG to include another attribute in AD you don't normally use (for example the Pager field in the Telephones tab).

You will still need to manually modify the attribute on the user's account to include them in emails sent to the DDG so either way manual intervention is required.
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by:paulrixon
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In 2003 you could modify the recipients filter to add individual users but this is greyed out in 2010. It says 'Use the Shell to modify the filter'.
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Looks like you need to use the Set-DynamicDistributionGroup command. See this article for more information on this command: https://technet.microsoft.com/en-us/library/bb123796(v=exchg.141).aspx

As for including a single user in the DDG, something like this may work:
Set-DynamicDistributionGroup -Identity DDGName -RecipientFilter {((RecipientType -eq 'UserMailbox') -or (Name -like 'Other User'))}

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I would personally create another DDG using the contents in the Filter tab of your existing DDG for testing. You can then look at incorporating the above code into your existing Recipient Filter.
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by:paulrixon
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Thank you very much. This worked a treat:

Set-DynamicDistributionGroup -Identity "DDGName" -RecipientFilter { RecipientType -eq 'UserMailbox' -and Office -eq 'Bergen' -or name -eq 'Username' }
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Sorry for originally misinterpreting what you wanted to do. Glad we got there in the end though :)
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