When you use the latest version of Office with Office 365, you can edit and review Office files from virtually anywhere you can use your computer, mobile device, or web browser. Depending on your operating system, here’s what Office includes:
- Office on your PC includes Access, Excel, Lync (Lync: An Office program that provides instant messaging, a contact list, audio and video conversations, online meetings, desktop sharing, and more.), OneNote, Outlook, PowerPoint, Publisher, and Word.
- Office on your Mac includes Excel, Outlook, PowerPoint, and Word.
Mac users can install Lync separately.
Note You can also install the latest version of Office on your Surface Pro. You’ll have all the same programs as Office on a PC.
To install Office when you sign in to Office 365 for the first time
- Sign in to Office 365 by using your user ID, and then click PC & Mac.
If you’re an admin, go to Admin > Settings 
> Office 365 Settings > Software.
- On the Office page, select a Language, and then click Install.
Note Office installs the 32-bit version on your PC by default, even if your computer is running a 64-bit version of Windows. If you are unsure which version of Office you should install, see Which version is best for me?
Note If this information doesn’t match what you’re seeing, you may be using Office 365 pre-upgrade. Try Install Office Professional Plus with Office 365 (small business) or Install Office Professional Plus with Office 365 (enterprise) to find the information that applies to you. Am I using Office 365 after the service upgrade?
You can install this version of Office on up to five computers. After you’ve completed the installation, make sure you have automatic updates turned on.
Note You can also use Office 365 with the version of Office you already have on your PC or Mac.
Watch this video to learn about using Office and Office Web Apps in Office 365.
Deactivate an installation on either a PC or a Mac
If you’ve already installed the latest version of Office with Office 365 on five computers and you want to install Office on a sixth computer, you can do that by first deactivating an installation on one of your current computers.
Go to Software > Office. Click Deactivate next to the computer you want to deactivate the installation from.
Troubleshoot your Office installation
I get the following error when installing Office 2013 or Office 365: "Something went wrong…”
General troubleshooting for installing Office 2013 and Office 365
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