Vern Weitzman
Using On premise Exchange and Active Directory, almost any LDAP query can be turned into a Dynamic Distribution List.
Ironically, Active Directory on Azure has lobotimized LDAP. A very good substitute is available with Azure AD Premium.
If you are using itrezzo UCM, this post has a pretty good set of instructions on how to create a Dynamic Group for Office 365 usage.
The final step shows you how to create a contact collection. If you are a UCM user, you will want to finalize the process with an ECO Collection.
