This is a new Exchange 2013 deployment, and I'm a bit confused by the default address books. Rooms show up under all users and under all rooms, dynamic distribution lists show up under the top level (Directory), but not under groups.  Can someone help me out here?

Hi ,

Could you please share us a snap by pointing on which you are referring ?

Hi RD,

It's due to default Recipient Filter, you can use the following command to fix it:

Set-AddressList "All Groups" -IncludedRecipients MailGroups

Update-addresslist "All Groups"

It will change the default RecipientFilter
From:

((Alias -ne $null) -and (ObjectCategory -like 'group'))
To:

((RecipientType -eq 'MailUniversalDistributionGroup') -or (RecipientType -eq 'MailUniversalSecurityGroup') -or (RecipientType -eq 'MailNonUniversalGroup') -or (RecipientType -eq 'DynamicDistributionGroup'))

Best regards,

Sorry it took me so long to get back to this, I got tied up.  But Niko, you hit it on the head.  Thank you.  Now one more... can I keep my rooms from showing up under All Users?

Thanks!

Ryan