Hopefully they are real smart and replace it with transparent, verifiable, privacy respecting, freedoms respecting, neutral software: Free software and open source.
> The head of digital services at the Aarhus Municipality culture and citizens’ department, Bo Fristed, said a German service provider had already replaced Microsoft at the municipality
Maybe Hetzner for the storage and OpenOffice for the software?
The only real alternative is a hacked together mess of open source software projects.
The "Microsoft Alternative" does not exist, despite the EU distributing billions into small companies and open source projects.
Bureocratic institutions go to Microsoft because you can get a great all in one package, on top of which you can install your custom stuff. There is no actual replacement for that basis, you can't even buy it. At best you get the pieces someone else has thrown together.
As far as I know, OpenOffice is seriously outdated since the Oracle acquisition and LibreOffice fork happened, regardless of current licensing and brand publicity.