You may want to replace one shared policy with another shared policy. You can replace the shared policy in either all locations or for individual locations.
When you replace a policy for all locations, the management server replaces the policy only for the locations that have it. For example, suppose the Sales group uses the Sales policy for three of its four locations. If you replace the Sales policy with the Marketing policy, only those three locations receive the Marketing policy.
You may want a group of clients to use the same settings no matter what location they are in. In this case, you can replace a non-shared policy with a shared policy. You replace a non-shared policy with a shared policy for each location individually.