I've solved the problem in the short term by adding values for "show In Address Book" using ADSI Edit.
However, I'd like to know how to set this up to be done automatically in Exchange 2010 for distributions lists like it was in Exchange 2003.
Most likely, this problem is not related to licensing.
First, I would suggest that you check your default recipient policy.
These virtual directories have different URLs and can be same or different for internal and external users depending upon installation scenario.
In this post, I will show steps to configure external and internal URL in Exchange 2016.
This Upgrade has to be done using Exchange Management Shell.It appears that a mailbox exists that can be logged into via Outlook Web Access, but no email address is defined.I can manually add the email address, but it still does not show up when a user is trying to pull up names from the Global Address List (GAL) in Microsoft Outlook.So, for internal users the domain name to access outlook on the web can be mail.and we can use same domain name for Internet users as well.Add CNAME record for mail.domain name in both internal and external DNS server.We recently went through an upgrade to Exchange 2010 and I've noticed that new distribution lists that have been created since the upgrade do not show up in the GAL.