Right click Active Directory users and computers and select "run as administrator"
Enter your zaccount credentials, the username will usually be your first initial last name such as zacleaveland for Anthony Cleaveland
Active Directory should open up and be functional
NOTE: Some profiles wont be able to log into Active Directory as Administrator. In those cases you will do the following:
Hold shift key while right clicking on Active Directory users and computers
You will enter your z credentials (The same ones as above)
Then it should pop up and function as before