Using OAB Global Web Distribution in Exchange Server 2010

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Happy new year my dear friends (and a freezing –5 here in Toronto Today!)

In Today’s post we are going over a nice feature that is not used a lot in most of the customers that I worked with which is the Global web Distribution for OAB.

In the default OAB we will see something like this for the Default Offline Address Book. In a normal situation we would go there and enable the Web-based distribution and add the servers which is totally fine when you have a few servers and you don’t change a lot.


However let’s think for a moment in environment with tons of sites where all sites have Exchange Servers, or in multi-tenancy environment where several servers are added/removed in a monthly basis.

The automatic solution!

There is a neat solution called GlobalWebDistributionEnabled on each Offline Address Book. What this feature does is that configures automatic any new CAS server to receive the OAB which is great. If you want to do that


In order to get the information about any given OAB we can run the following cmdlet:

Get-OfflineAddressBook | Select Name,Version,AddressLists,Global* | fl

Cool, eh? If you want to enable that we just need to run the following cmdletL

Set-OfflineAddressBook –Identity ‘Default Offline Address Book’ –GlobalWebDistributionEnabled $True


Now if an administrator goes there to try to add something that is going to be the message:


Note: The Public folder distribution method is not impacted by this procedure so it’s up to you whether you enable or not such feature.

Written by Anderson Patricio

Anderson Patricio is a Canadian Exchange Server MVP and MCSM (Solutions Master) and he contributes to the Microsoft Community with articles, tutorials, blog posts, forums and book reviews. He is a regular contributor at, and (Portuguese).