I am not sure how much this product is still in use by others, but we still use it. kb5001779 - the April 2021 security update for Exchange on premises changes the way powershell scripts are called remotely - and this prevents many Exchange monitors on UCCS from running, basically rendering the product useless.
According to the Microsoft exchange team blog thread on this "we can now confirm that the change that broke several 3rd party products as well as some home-grown code calling .AddScript() is not going to be rolled back and .AddCommand() is a way forward. I have just added the Known Issues section to the blog post to reflect this (a KB article will follow next week)"
Released: April 2021 Exchange Server Security Updates - Microsoft Tech Community
This is most unfortunate.
Thanks
Greg
