Microsoft has announced in a blog post that device limits for Office 365 Home and Office 365 Personal customers will soon be a thing of the past. That means you’ll be able to use the online software suite on any device you want, including those belonging to friends and family members.
From the blog:
The Office 365 Home and Office 365 Personal subscriptions currently include device install limits. Home limits subscribers to 10 devices in total (across five users) and Personal limits subscribers to one PC or Mac and one tablet. Starting October 2, subscribers can install Office on an unlimited number of devices—and be signed into their accounts on up to five of those devices at the same time.