Receive restrictions for Exchange Online mail-enabled distribution groups
NOTE: The Assign mail acceptance and Assign mail rejection assignments are mutually exclusive. You can specify whether to accept or deny the recipient's message.
 
To modify mail acceptance for mail-enabled distribution groups
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In the Manager, select the Azure Active Directory > Mail-enabled distribution groups category.
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Select the mail-enabled distribution group in the result list.
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Select the Assign mail acceptance task to specify recipients whose messages are accepted.
- OR -
Select the Assign mail rejection task to specify recipients whose messages are rejected.
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Select the table containing the recipient from the menu at the top of the form. You have the following option:
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In the Add assignments pane, assign recipients.
TIP: In the Remove assignments pane, you can remove assigned recipients.
To remove an assignment
 
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Save the changes.
 
 
    Customizing send permissions for Exchange Online mail-enabled distribution groups
Use the Send on behalf of send permission to specify which users can send messages on behalf of the distribution group.
To customize send permissions for mail-enabled distribution groups
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In the Manager, select the Azure Active Directory > Mail-enabled distribution groups category.
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Select the mail-enabled distribution group in the result list.
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Select the Assign send authorizations task.
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Select the table which contains the user from the menu at the top of the form. You have the following option:
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In the Add assignments pane, assign users.
TIP: In the Remove assignments pane, you can remove assigned users.
To remove an assignment
 
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Save the changes.
 
 
    Specifying moderators for Exchange Online mail-enabled distribution groups
Moderated distribution groups let a moderator approve or deny messages sent to a mail-enabled distribution group. Only after a message has been approved by a moderator can it be forwarded to members of the mail-enabled distribution group.
To specify moderators for a mail-enabled distribution group
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In the Manager, select the Azure Active Directory > Mail-enabled distribution groups category.
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Select the mail-enabled distribution group in the result list.
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Select the Assign moderators task.
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Select the table which contains the user from the menu at the top of the form. You have the following options:
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Mailboxes
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Mail contacts
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Mail users
 
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In the Add assignments pane, add the moderators.
TIP: In the Remove assignments pane, you can remove assigned moderators.
To remove an assignment
 
 - Save the changes. 
 
 
    Specifying Exchange Online mail-enabled distribution groups
Membership in mail-enabled distribution groups can be applied for and approved. Specify which users manage the mail-enabled distribution group and therefore can grant approval for membership in the group.
To specify a mail-enabled distribution group
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In the Manager, select the Azure Active Directory > Mail-enabled distribution groups category.
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Select the mail-enabled distribution group in the result list.
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Select the Assign administrators task.
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Select the table which contains the administrators from the menu at the top of the form. You have the following options:
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In the Add assignments pane, assign the administrators.
TIP: In the Remove assignments pane, you can remove assigned administrators.
To remove an assignment
 
 - Save the changes. 
 
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