That probably had nothing to do with LibreOffice. Lots of people have had their MS accounts locked for no reason. I guess the automatic abuse detection system just sucks.
My advice is don't use a MS account if you can, at least not for anything critical. You don't need it for development, you can use 3rd party CAs for signatures.
My advice is don't use a MS account if you can, at least not for anything critical. You don't need it for development, you can use 3rd party CAs for signatures.