How to view and update address list membership for objects in Exchange Online

Original KB number: 4054858

Summary

This article describes how to view and update address list membership for objects in Microsoft Exchange Online.

To see whom the filter applies to, run the following command:

$a = get-addresslist "my list"
Get-recipient -filter $a.recipientfilter

To see which users are stamped by the address list that you created, run the following command:
```
Get-Recipient -Filter {AddressListMembership -eq 'DistinguishedName of the address list'}
```
For each object that you see in step 1 but don't see in step 2, you have to tickle the object. To do this, use one of the following options directly in an instance of Windows PowerShell that's connected to Exchange Online.

Option 1: If the object is a mailbox, run the following commands:
```
set-mailbox -applymandatoryproperties
```
```
set-Mailbox -SimpleDisplayName
```
Option 2: Run the following command:
```
Set-MailUser -SimpleDisplayName
```
Option 3: Set any relevant attributes, including custom attributes, on-premises. Then, synchronize the changes to Exchange Online through Microsoft Entra Connect.

After you tickle the objects, you should see them by running the command from step 2. You can also verify the objects individually by running the following commands:
```
Get-Mailbox -identity user@contoso.com|fl Addresslistmembership
```
```
Get-Mailuser -identity user@contoso.com|fl Addresslistmembership
```