You'll need to use your work email to apply and your workplace needs to be enrolled in the Microsoft Home Use Program. Includes Word, Excel, Outlook, PowerPoint, OneNote, Access (PC Only) and Publisher (PC Only), plus 1TB per user OneDrive, and 60 minutes of Skype calling.
As mentioned by phidj003 below https://www.ozbargain.com.au/comment/10398182/redir you can also stack this. I bought 3 x Personal followed by 1 x Family, and I now have four years of Family for $213.
Get a cheap Office 2019 key and save yourself from the obvious cash grab by Microsoft