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.
Follow the steps below to add a delegate (the person granting the access to the delegate will need to perform these steps)
1. In Outlook, go to File > Account Settings and hit Delegate Access
2. At the delegates screen, hit Add and proceed to search for the accounts that will get the delegate permissions. When finished, click OK
3. Select the specific permission levels for each item and click OK when finished. By default any delegate will be able to read and modify calendar meetings.
4. When finished you should see that person's name in the list. From here you can add more delegates, remove them, or modify any current permissions. When done, click OK. Outlook may need to be closed out and re-opened for the changes to take effect. Please also allow at least 30 minutes for the changes to complete.