1) Click File in Outlook.
2) Click Account Settings.
3) A drop down box will open up. Click Delegate Access.
4) A Delegates menu will pop up. Click Add.
5) Search for the person you want to have access, Click on their name, then "Add", then "OK".
6) A Delegate Permissions menu will pop up. This is where you set up what your delegate can do in your email.
7) Click OK and you're done. That person now has access to your email.