If you have got Cached Exchange Mode disabled for some reason, you can enable it via; File- Aside from Cached Exchange Mode, Instant Search also needs Windows Search in order to work.The Outlook Social Connector, which adds the People Pane in Outlook, in its turn relies heavily on Instant Search.has long been a good source of information about Outlook.Its piece on “All you need to know about Outlook 2013 Preview” said that Outlook 2013 uses a new compressed format for the OST which results in files up to 40% smaller than before.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.The order in which it does this depends on your version of Outlook (see the table below).While you can’t directly change the sync order, you can still influence it by selecting the folder that you want to have synched.
The new OST was much smaller than the older version used by Outlook 2010, a fact that seemed to be a good thing at the time even if the creation of OSTs en masse might generate a resource consumption problem for servers if you deployed Outlook 2013 to multiple users at one time.
This means that when you are using an Exchange account, you will need to enable Cached Exchange Mode (CEM) for them to work.
Cached Exchange Mode is enabled by default when you configure an Exchange account and is also highly recommended.
This can be especially bothersome in Calendar when granting access to others due to a delay in recognizing these newly-granted permissions.
In Cached Exchange Mode, Outlook 2007 & 2010 downloads a local copy of the Global Address List (GAL), but only updates it every 24 hours.