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We recently went through an upgrade to Exchange 2010 and I've noticed that new distribution lists that have been created since the upgrade do not show up in the GAL.

Can somebody please tell me what I need to do to ensure these show up in the GAL?

The Outlook clients are in cached mode but they update the GAL every 24 hours and these distros still don't show up.

Thanks in advance.

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Have you switched OAB creation to the new server? – Vick Vega Apr 25 '11 at 18:39

While I was doing some testing of the old way (pure AD call) that we used to create DGs in E2k3, I found that once in a e2k10 environment there is a need to run the powershell command (Set-DistributionGroup) to update the DG specifically the property "HiddenFromAddressListsEnabled" with the appropriate value for it to show up in GAL. Of course when you run this command, you will be prompted to upgrade the DG which seems to be affecting some attributes (msExchangeVersion, showInAddressBook etc.).

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I've solved the problem in the short term by adding values for "showInAddressBook" using ADSI Edit. However, I'd like to know how to set this up to be done automatically in Exchange 2010 for distributions lists like it was in Exchange 2003.

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