Google Apps Helpful Hint: Delegation in MS Outlook
If you delegate your email and calendar in Google Apps (Premier or Education editions), the person to whom you delegate, can handle messages and calendar events on your behalf from the Outlook client if you are using the Google Apps Sync for MS Outlook tool.
When you grant access to your account in Gmail, and share your primary Calendar, those messages and events are synced to the Outlook client. The person to whom you delegate can then receive and answer email on your behalf, as well as create and respond to calendar invitations on your behalf.
Click here to learn how to delegate access