How to make someone Delegate to a Calendar

What does Delegate Access do? Delegate Access goes beyond just sharing access to your folders. Delegates are granted additional permissions, such as creating email messages or responding to meeting requests on your behalf. See Manage another person's mail and calendar items to learn how delegates can perform these tasks. As the person granting permission, you determine the level of access that the delegate has to your folders. You can grant a delegate permission to read items in your folders or to read, create, change, and delete items. By default, when you add a delegate, the delegate has full access to your Calendar and Tasks folders. The delegate can also respond to meeting requests on your behalf.