Add/Remove Distribution Group Delivery Restrictions

Requirements

Exchange Online powershell module

Connect-ExchangeOnline

To view current delivery restrictions

Get-DistributionGroup [email protected]

or

Get-DynamicDistributionGroup

Example:

To add members:

Set-DistributionGroup 

or

Set-DynamicDistributionGroup

Example:

Set-DynamicDistributionGroup avastaff -AcceptMessagesOnlyFromSendersOrMembers @{Add="[email protected]"}

For adding multiple members:

@{Add="[email protected]","[email protected]"}

To remove, simply replace @{Add with @{Remove