We have like 8-10 service accounts that require their passwords to be rotated every 90 days and I don't like doing that by hand. 
The passwords had to be kept in a simple format with randomly generated numbers as well. 

The original FireFly documentation does help in trying to get this to work. It's of course Linux based, but I wanted to make it with Powershell.

To be honest, there isn't much reason to use this. The Microsoft Admin portal if you have access has an simple export button that does the same thing.
I only made this because at the time I didn't have access to the admin portal because it was managed by another department and I needed to see who has a Office license at that moment

Someone once sent me a link to https://catass.com because I enjoy cats. So I build something with it.
So if you are in the business of harrassing your friends, family, co-workers or enemies with cats, then you've come to the right place!