inDesign License question

what is the way to convert from licenses that The IT office in my company buys and assigns to users to having the users buy the licenses directly?

I work for a Catholic diocese. One of the parishes in the diocese uses InDesign. Before I was hired, the office here at the diocese was purchasing licenses for adobe products and assigning them to parish users. Over time the office has lost all of it's employees, except me. At his point, I have little free time to worry about the licenses. I do get the email about the licenses needing to be renewed, I email the parish, get no response until well after the license no longer works and they are prepping for Christmas Mass and can't use the product. I then have to scramble to get them a license.

I'm looking for advice so I can explain to the parish how they go about obtaining the license and install it themselves. This way they can be responsible for this and can get the program renewed before it expires.