Dynamic distribution group not working with hub transport rule

I have setup a hub transport rule to bounce back messages designated for members of a dynamic distribution group. The group is comprised of all users in a particular OU.

The action doesn't happen. I tried it with a regular group and it works. Is there a trick to this. Exchange 2007
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jsuttorAsked:
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LegendZMConnect With a Mentor Principal Security ArchitectCommented:
I believe it may take up to 4 hours for changes to take effect for transport rules because of the Recipient Cache interval. To bypass this, try restarting the Transport services on all Hub Transport Servers.
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jsuttorAuthor Commented:
Awesome. I thought about just waiting but I'm impatient, restarting the service worked.
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