Global address list not updating exchange 2016 cached mode

Outlook Social Connector is normal - I have it on my contacts as well.

Microsoft Support has an article on offline address books which may be helpful in this situation..appears you have cached mode turned on (it is by default on the clients) The Outlook Social connector (Free with Outlook 2010/2013) will do what you are asking for.

Microsoft Outlook clients use a cached mode of the GAL, called an Offline Address Book that is synced with the GAL at a nearly daily interval.

So, it can take multiple days before a change in on Enterprise level (Banner/NESSIE) will propagate to be visible in Outlook.

Before installing your first Exchange 2013 server during a migration project you must first review your offline address book configuration.

To avoid mailbox users on the other four databases re-downloading the entire OAB we can assign an OAB to the databases.

Information in the GAL is only updated once a day from AD.

AD service managers are responsible for the GAL data, though Exchange service managers have access as well.

You have set up Outlook Photos and added photos as you require, however the photos are not appearing in Microsoft Outlook 2010.

The Global Address List (GAL) has not updated from Active Directory.