Hide external contacts from the shared address book

Some companies may use external contacts only so they can be added as members of distribution groups. In this scenario, they may want to hide external contacts from the shared address book. Here’s how:

Hide a single external contact

Set-MailContact <external contact> -HiddenFromAddressListsEnabled $true

For example, to hide Franz Kohl from the shared address book:

Set-MailContact “Franz Kohl” -HiddenFromAddressListsEnabled $true

Hide all external contacts

Run the following command to hide all external contacts from the shared address book:

Get-Contact -ResultSize unlimited -Filter {(RecipientTypeDetails -eq 'MailContact')} | Set-MailContact -HiddenFromAddressListsEnabled $true