How to Set the Message Formats for a Policy
You can control how Exchange formats the messages that are sent to the domain or domains on a particular policy. This procedure outlines how you can set the message formats for a policy.
Procedure
To set the message formats for a policy
In Exchange System Manager, right-click the policy, and then click Properties.
On the Message Format tab (see the following figure), select the message encoding and character sets that you want to use with this policy.
Message Format tab for the Contoso policy