In the past we could have short usernames, but could not manually set passwords (causing issues with printers etc). Now we can manually set passwords (huzzah!), but now usernames are required to be 5 characters long. Why is this?

I use initialisms or initials, so I have a bunch of old legacy two-letter usernames, but can not create new accounts with two letters. This inconsistency is causing issues with code that relies on standard naming conventions, and I am having to hard code around the issue, which is a terrible thing to do.