If you been trying to setup Office 365 link in the Windows Phone Office App, after you had activated your personal subscription offer that came with Lumia 640 and Lumia 640 XL, you are doing it wrong. It will not work, and up with error. As a matter of fact, even I was doing it wrong. The Office 365 option in your Windows Phone helps you to connect with Enterprise server, and what we have is a personal subscription that is supposed to be working with OneDrive.

You may ask, that Office, One Drive and it’s integration been there with Windows Phone since long. So whats new with this? The short answer to this is the License to use it on Windows or Mac & On Tablet is new, that too a complete Office Package instead of online version which is limited in functionality. The free online version is what you already have with One Drive & Windows Phone edition.

Get the full, installed Office experience on 1 PC or Mac, 1 tablet (including iPad and Android tablet) and 1 phone. ( Imaging with a person not having Windows Phone will get the benefit of using it on Android or iPhone as well)

Get 1 TB of OneDrive online storage for documents, photos, and videos, so you can edit and share them from anywhere, on all your devices.
60 monthly Skype minutes for 12 Months. ( You need to use Skype App for this)
Latest Software & Features Always.

How to Activate it ?

You will get an email right with activation code after this process. You need to follow the instruction in the email to activate.

How to use it?

Once you have your subscription confirmed, download the Office Software on respective platform. You get complete office suite i.e. Word, Excel, PowerPoint and Outlook. This will give you power to edit document with all features. Now, to make this experience work across platform, you need OneDrive App on the platform you use. Phone, Mac or Tablet. You need to save it on OneDrive, and open it from OneDrive.