1. On the Home tab, in the Search People, click Address Book.
  2. In the Address Book dialog box that opens, click Tools > Options.
  3. Under When opening the address book, show this address list first, choose the Global Address List.

  4. Click OK.
  5. Click Custom.
  6. Click Add and select the Global Address List and click Add then Close

  1. Click the up Up arrow and down Down arrow arrows next to the list to move the Global Address List to the top.


8. Click OK.


Differences between - Online Global Address List and Offline Global Address List (OAB)

Online Global Address List (GAL)


  1. Availability:

    • The Online GAL is accessed directly from the server, meaning you need an active internet or network connection to view and use it.

  2. Real-Time Updates:

    • Changes to the Online GAL, such as adding or removing users or updating contact information, are reflected immediately since it pulls the latest data from the Exchange server.

  3. Usage Context:

    • Typically used by clients that are constantly connected to the network, such as Outlook Web Access (OWA) or Outlook clients in online mode.

  4. Data Source:

    • The Online GAL is sourced directly from the live Exchange server, ensuring that the most current data is always available.


Offline Global Address List (OAB)


  1. Availability:

    • The Offline Address Book (OAB) is a downloaded copy of the GAL that is available for use when an internet or network connection is not available.

  2. Update Frequency:

    • The OAB is updated periodically (typically once every 24 hours), so there may be a delay in reflecting recent changes such as new user additions, deletions, or modifications.

  3. Usage Context:

    • Used by Outlook clients configured in Cached Exchange Mode. This allows users to access the address list even when they are offline.

  4. Data Source:

    • The OAB is generated and distributed by the Exchange server to clients. Clients download the OAB to their local machines for offline use.

RGU IT and Digital 

https://itservicedesk.rgu.ac.uk

Tel: 01224 262777