Microsoft is putting a lot of stock in Office 365 — the productivity service just became much more tempting.

Office 365 subscribers will now have access to premium features on Microsoft has announced the premium features, which include ad-free inbox, are now rolling out to subscribers, with more features to be added in the future.

To up it, Microsoft says that in addition to 365 subscribers, all loyal users whose mailbox is 12GB or larger will be updated to 50GB.