Outlook 2016 gal not updating in cached mode

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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.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to update at 5 AM each morning.In addition, if you are using Microsoft Outlook 2010 in cached mode it may be storing an out-of-date copy of the GAL.This situation however is extremely rare since the default maintenance time on Exchange is at AM and updates and downloads are usually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.

But From Exchange 2013 Outlook Connects to the Client Access Server And the requests are proxied to the Mailbox Server Lets See what is happening in the Background In my Case all Roles are installed on the Same Server Offline Address book Generation Server will be a Mailbox Server.Cached Exchange Mode enables a better experience when you use an Exchange account.In this mode, a copy of your mailbox is saved on your computer.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.In other words, your PC or device does not store any GAL information locally.

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