Updating global address book
In general, OWA offers realtime updates, while Outlook takes 26 hours.
Outlook can be manually updated via the other solution: That is, you can send email to any user in AD.
Working with like minded colleagues now specializing in very large scale complex migrations from Lotus Notes and On-Premise Microsoft Exchange to Office 365.
may not be available even though such changes have been made in Active Directory.https://helpdesk.broward.edu/TDClient/KB/Article Det? ID=15080 Updating Global Address Book for Lync/Skype for Business (Faculty\Staff) Steps to update your contact list in Lync (Skype) if it is not updating automatically, or you need to find a new user before the automatic update catches up.Everyone that is active in the Active Directory (AD) (i.e., people with a left_uiuc field are not included), will show up in the Global Address List (GAL).If these attributes are present, then the AD Objects that are Mail-Enabled or Mailbox-Enabled will appear in the GAL – and ultimately the Offline Address Book.
You can see the list of attributes that will be put into the GAL using When Outlook users are running in cached mode, they rely on the Offline Address Book (OAB) to provide them with access to one or more addresses (that are always available when they are connected directly to Exchange) The OAB is rebuilt and downloaded on a default schedule as shown below.Here is a quick way to copy the GAL to your persona contact list and therefore have everyone in your contact list.