If you are using the Azure RemoteApp (ARA) Preview you previously had the option to grant users access to ARA using Active Directory Groups (for Hybrid Scenario’s).
Note that this support will end soon: on November 30, 2014. To ensure continuity, any user group assignment you have before today will continue to work until November 30, 2014. All users in current groups will still have access , even though the groups are not shown on the User Access page.
If you have signed up for the ARA Preview, you should have been notified via e-mail on November 6th.
After this date, you will need to assign permissions per user. The reason behind this is making billing and usage simple and predictable. Microsoft has not disclosed pricing and SLA to the public yet.
Using a bulk import is of course a step back in regards to easy of management, but it apparently had to be done to be fully prepared for the upcoming billing model. Will it return as part of Azure’s fast release model? let’s hope so! :)