Can I proxy with Outlook?

Yes, though in Outlook they are called Delegates. You add people to your list of Delegates in by going to Tools -> Options -> Delegates.

1. On the Tools menu, click Options.

2. Click the Delegates tab, and then click Add.

3. Type the name of the person whom you want to designate as your delegate, or search for and then click the name in the search results list. Note: The delegate must be a person in the Exchange Global Address List (Global Address List: The address book that contains all user, group, and distribution list e-mail addresses in your organization. The administrator creates and maintains this address book. It may also contain public folder e-mail addresses.).

4. Click Add, and then click OK.

5. In the Delegate Permissions dialog box, you can accept the default permission settings or select custom access levels for Exchange folders.