Hi
it depend of the licence your company purchase and if they block it or no (for example, we have blocked it even if we have the licence that allow it.
Go to the page "https://myaccount.microsoft.com/ ". then select the "office apps" option on the left if it exist. Go then to the "apps and device" and see if the download of office 365 is allowed.
The licence is supposed to be active for as long as you are an employe/student ( and you need to login in word/office with the employe/student login, max 5 active installation if I remember well)