"Only 20.3% of the schools have updated data of their alumni."
Here are the different approaches taken by alumni offices like yours, gathered from our experience working with schools around the world.
2.Calling your alumni
Thankfully, modern technology makes it possible for you to keep a track of all your alumni on Facebook and LinkedIn and update all their changes automatically. So if an alum moves from Google to Microsoft and San Francisco to Seattle, you know it immediately and your database gets updated automatically.
The easiest way is to outsource or buy software that takes care of all these nuances and provide you an easy-to-use system.