Uploading a Fresh List of Active Employees on The PERFORM Side

Summary

Some how-tos on uploading employee lists

Content

Our way of updating employee info such as salaries, addresses, supervisors, titles, etc. is to upload a complete list/file of all employees with the current info. It over-writes the data.  This is so much easier than updating the individual fields for subject employees.

We want to do this for: 1) all employees; 2) all users; and 3) all managers.

Is this possible?  How? Will such uploads over-write the pre-existing data?

Thanks in advance, Harold