Change Exchange Retention Policy Age Based

Hi,

I have around four policies are setup; Low, Normal, High and Over Limit. These polices set as per the Exchange server DB Category, Low, Normal, High and Over Limit.

Each EV Retention Policy of the items age set differently, the Low is different, Normal, High and Over Limit, each has different policy age defined.

I have changed the age of the Low Policy from 6 Months two 1 Month and Override Settings from 3 Months to 2 Weeks.

Now, the target mailboxes within this policy, should change and any old items older than 1 Month should be ready for Archive,!!!! This is not happening, how long should I wait for the changes to take effect and the settings will be propagated to the target mailboxes?

Is there any other steps to take in order to accomplish this?

Thanks,