

Probably wouldn’t be a bad idea to do something along the lines of stating upfront that “if anyone in the company does anything to offend you, please report it to the appropriate channels. You’ll have our full support. We’re here to get work done, not to make people feel bad”
You’re not likely going to say by accident something they haven’t heard before, or to offend them in a new and novel way, But establishing and occasionally reinforcing the fact that they don’t have to tolerate it, that putting up with abuse is not part of their job, and that they have the boss’s backing at the same level of the non-LGBTQ employees should they find themselves being abused or offended, would probably go a decent way in minimizing the risk of something actually bad happening.
I am IT staff and I’ve worked for government in the past.
No matter how easy you make the swap over, no matter how much money it offers to save, there’s gonna be somebody who has sign off level executive authority who will refuse to change anything, because it means changing something, and they won’t like it.
Making a company-wide transition from Microsoft to a free version that does exactly the same is not a simple change.
If you make the change, you’re going to see a huge upswing in the number of support calls. You’re going to see a huge upswing in the number of complaints. You’re going to see downturns in efficiency and productivity as people make the changes, not to mention the fact that administering libreoffice from an organizational standpoint is a completely different beast from administering office.
I’m not saying that it can’t be done, by any stretch of the imagination.
I’m saying that the human element is the largest factor in whether or not it would be done, and unless you are already the city administrator or a big to-do inside of the fish pond you find yourself in, you likely do not have the human capital needed to make the transition, regardless of every other benefit.
If you want to get this done, I would suggest preemptively installing libre office on every single computer in the entire organization and then slowly telling people to use it as the opportunity arises so that three to five years from now there will be enough people who have used it that the transition would not be a huge ordeal.
Short of that you need to have an executive mandate from on high come in and say, we are not using Microsoft Office anymore, we will use LibreOffice, here are your training hours, go.