Global address list is not updating
The Microsoft Exchange default is for this to update at 5 AM each morning.In addition, if you are using Microsoft Outlook 2010 in cached mode it may be storing an out-of-date copy of the GAL.You can see the list of attributes that will be put into the GAL using When Outlook users are running in cached mode, they rely on the Offline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.Because of this, a new user may not be visible in the address book, or changes to a user’s name, address, etc. Murray has been working in IT for over 15 years specializing in the Messaging Arena and in particular IBM Domino and Microsoft Exchange and now of course Office 365.Working with like minded colleagues now specializing in very large scale complex migrations from Lotus Notes and On-Premise Microsoft Exchange to Office 365.This document seeks to address and clarify the small misunderstanding surrounding the GAL (Global Address List) and the OAB (Offline Address Book).Quite often all Administrators, even Exchange Administrators simply refer to the users they see in the Address section of Outlook casually as the GAL for ease of reference, but really more often than not, you are looking at the OAB.
Additionally, the Update-Address List and Update-Global Address List cmdlets aren't currently available in Exchange Online. In this article I will detail all the steps you need to follow to manually update any Address List in Exchange Online, this guide will be divided in two sections: Our next step will be to go to Power Shell and run the following commands To know how to connect to Exchange Online, please see: Set-Execution Policy Unrestricted$User Credential = Get-Credential Connect-Msol Service -Credential $User Credential$Session = New-PSSession -Configuration Name Microsoft.
This situation however is extremely rare since the default maintenance time on Exchange is at AM and updates and downloads are usually performed during working hours.