Using Microsoft Exchange GAL - Airmail for macOS
The Global Address List is automatically enabled on your account, but you can make sure with these steps:
Open Airmail.
Open Airmail Preferences (⌘,)
Click on the settings icon next to the MS Exchange account.
Click on the 'Composer' tab
Make sure the "Global Address List" is ticked.
Click on "Save".
Open Airmail.
Open Airmail Preferences (⌘,)
Click on the settings icon next to the MS Exchange account.
Click on the 'Composer' tab
Make sure the "Global Address List" is ticked.
Click on "Save".
Updated on: 01/13/2019
Thank you!