When a new email account is created in Exchange it will not normally appear in the address book of others until the following day.
This procedure shows how to force newly created accounts to be visible in the address book: About the author: Brian Cryer is a dedicated software developer and webmaster.
Check out Microsoft's FAQs for Office 365 (https://support.office.com/).
This morning I was asked to update the Global Address List and Offline Address Book in an Exchange environment.
When changes occur within the main Global Address Book (GAL) on the Office 365, computers running Outlook 20/2016 may not automatically receive the updates.In order for some GAL entries to show up properly you may need to turn off Cached Exchange Mode.Please visit the document on How to turn on or off Cached Exchange Mode for (Outlook 2010, and Outlook 20).Exchange 2013 has gone through an evolution in the way the Offline Address Book is generated and maintained.While most of the changes are advantageous, I ran into a chink in the armor while working with a customer who was having an issue with Exchange 2013 DAG replication.