In the Information to download section, select Full Details and in the Address Book section, choose \Global Address List. **NOTE** Please read this section carefully, or your update will not work!!Step 3: The new version of the GAL will now be downloaded.
An offline address book (OAB) is a copy of an address book that's been downloaded so that an Outlook user can access the information it contains while disconnected from the server.
By default, a new OAB is generated every 8 hours in Exchange Server 2016, but you can change the interval by using the Exchange Management Shell.
You can find a OAB Virtual Directory in IIS – in the Client Access Server The Request to the Client Access (OAB Virtual Directory) Proxies the request to the “Exchange Back End” (OAB Virtual Directory) which is a Mailbox Server Containing OAB Files where client downloads the OAB Files Offline Address Book Storage Location Offline Address book Stores its files to a “System Mailbox” Which is called as “Organizational Mailbox” Where if the database fails the Organization Mailbox can failover using Database availability Group. It looks the database which owns the Organization Mailbox and OAB files are copied over to the Disk in the appropriate Mailbox Server and it has been to the Client.
Where OAB is no more a single point failure in Exchange 2013 To See which Organizational Mailbox is storing OAB files – You can see – “Organization Capability OABGen” Then Its Copied over to the disk in the Form of LZX files Default Location: (Differs if you install Exchange on a Different Drive) C:\Program Files\Microsoft\Exchange Server\v15\Client Access\OAB They will be copied to the disk in the Form of LZX files How to find the Offline Address book url , which is used for OAB Downloads From Outlook 2007 , Outlook 2010 and So on , Outlook Downloads Offline Address book using the OAB Url Web-Based (IIS) You got to Specify the External Url if you are going to use Outlook Anywhere using Set-Oab Virtual Directory Cmdlet To Find which OAB a User Downloads Go to a Client Machine Hold your Ctrl Key and Right Click on the Outlook icon – Click on Test Email Auto Configuraion Now Using Auto Discover , You can see the Offline Address book URL as listed below with the Correct Guid Value To Find the GUID Value of the Offline address book Client will Download their Own OAB depends upon their “Client Settings in Database Properties” If its not specified – By Default they will download the “Default Offline address book” Or If they have address book policies applied They would Download their own OAB respective to the Policy Now Depends on the Update Time “Organization Mailbox” will get updated on the Mailbox Server.
For Users where Outlook is in Cache mode, They got to have their Outlook Address book Updated ,when they can access the latest Address book while they go offline.
If Outlook is left running constantly in Cached Exchange Mode, it updates the Offline Address Book automatically about once a day, depending on Address Book updates on the server running Exchange.Time and Date: Thursday, March 23, 2017, starting at 10am EDT | 9am CDT | 7am PDT Sign up for this event today!Now you would wonder why it is showing Exchange 2013 OAB name. This is one of the OMG situation because you saw the warning that you can’t install Exchange 2013 any more while updating active directory and Exchange 2013 is there.Outlook is helping you complete other activities and does not allow the address book update to interfere.My computer slows down when Outlook shows the "Updating Address Book" status. In computers with slow hard disk drives, such as portable computers, or running Outlook in a Virtual machine, the process of updating the address book can slow down the computer if the hard disk is fragmented.The Download offline address book check box in the Send/Receive Settings - "Group_name" dialog box does not affect the 24-hour download process.