For faculty and staff with student workers who need to access files and send emails on their behalf, just telling the student their login credentials may seem like the simplest option. Unfortunately, this gives the student worker access to all your data, not just the information they need for their job, and destabilizes the entirety of the Etown network. Passwords CANNOT be shared with others, no matter how much you trust them.
However, the same data-sharing can be done in a much safer manner. Contact ITS at email@example.com to set up a shared account with a student worker.