Increase frequency of Outlook offline address book download

I am currently running Outlook 2003, 2007, and 2010 clients against Exchange 2010. I want updates to the OAB, such as users leaving the company, to show up more quickly than a day or two. I understand how to increase the frequency of the OAB generation on the Exchange side but not for Outlook.

I understand it is possible to manually select "download address book" in Outlook but I have hundreds of users so I need something that will automate this.

Thanks very much for your help
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Julian123Asked:
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Julian123Author Commented:
Is there a way to push send/receive groups down to all outlook clients using group policy that download the OAB regularly?
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SaakarSenior Technical ConsultantCommented:
Set-OABVirtualDirectory "OAB (Default Web Site)" -PollInterval <number in minutes>
http://technet.microsoft.com/en-us/library/bb123710.aspx
http://technet.microsoft.com/en-us/library/cc501344.aspx

Should help!!
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Julian123Author Commented:
Thanks but that's when CAS boxes download the OAB from the server generating it. I"m asking about Outlook.
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fireline1082Commented:
in your outlook client, check to disable Exchange cache mode.

This will make client, keep contacting the server for update

just give it a try, it may help; but may consume more bandwidth. test with one client as a start

http://office.microsoft.com/en-us/outlook-help/turn-on-or-off-cached-exchange-mode-HP001022343.aspx
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seb_ackerCommented:
Sorry, there is no way to have the outlook client dowload it more often, except having the user download manually the adress book.
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