Hi Nellyj0
Thank you for your question.
GAL is stored in AD and contact is stored in mailbox. when you contract with somebody, the contact will add to contact .
You can also manually add contact from GAL to the contact.
If there are any questions, please let me know.
Best Regard,
Jim
Diane is correct. If you want to automatically sync the GAL to iPhone and Outlook users on Exchange, you will need to add that capability to your environment.
Also review this blog post about best practices to sync the GAL to smartphones.
http://blog.itrezzo.com/2014/02/how-to-sync-gal-to-iphone-Android.html