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====== Exchange Distribution Groups ======

===== External =====

To make an Exchange Distribution Group externally accessible:

**Exchange Management Console -> Recipient Configuration -> Distribution Groups -> Properties

Mail Flow Settings -> Delivery Restrictions -> De-Select All Senders are Authenticated**

===== Mail-Enable a Security Group =====

<file>
Enable-DistributionGroup -Identity "Group Name"
</file>

===== Send On Behalf Of =====

http://exchangeserverpro.com/exchange-2010-grant-send-behalf-permissions-distribution-group/

===== Send As =====

:!: When testing, pick the From address from the GAL.

:!: This seems to require these steps:

  - Create a separate Distribution Group for each outbound identity
  - Set the Reply Address to the desired outbound identity
  - Modify the Distribution Group to grant ''SendOnBehalfOf'' permission to users
  - Modify the Distribution Group to grant ''SendAs'' permission to the same users
  - Restart the Information Store service (only needed to immediately activate the changes)

http://exchangeserverpro.com/exchange-2010-send-as-permissions-distribution-group/

  * SendAs another user or public folder may be easier
  * Consider using a security group rather than giving permissions to individual users (over and over)
  * The Distribution Group must be a Universal group
    * ''Set-Group "Group Name" -Universal''
  * Restart the Information Store service to activate changes immediately (otherwise you have to wait)
    * ''net stop MSExchangeIS''
    * ''net start MSExchangeIS''

List Public Folder or Distribution Group:

<file>
Get-DistributionGroup "Group Name"
</file>

Optionally, you can further verify "Send As" target is a Distribution Group:

<file>
get-recipient -results unlimited | where {$_.emailaddresses -match "targetemailaddressg@yourdomain.tld"} | select name,emailaddresses,recipienttype
</file>

Show "Send As" permissions for a Distribution Group:

<file>
Get-ADPermission -Identity "Group Name" | where {($_.ExtendedRights -like "*Send-As*")} | FT -Wrap
</file>

Grant a user or group "send as" permission:

<file>
Add-ADPermission -Identity "Distribution Group Name" -User "User or Security Group" -ExtendedRights Send-As
</file>

Show "send on behalf of" permission:

<file>
Get-DistributionGroup -Identity "Distribution Group Name" | fl GrantSendOnBehalfTo
</file>

Grant a user or group "send on behalf of" permission:

<file>
Set-DistributionGroup -Identity "Distribution Group Name" -GrantSendOnBehalfTo "User or Group Name"
</file>
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