Download and install or reinstall Microsoft 365 on a PC or MAC : IT Service Desk

Sign in to download and install Microsoft 365 or Office on a PC

Go to www.office.com and if you're not already signed in, select Sign in.
Sign in with the account you associated with this version of Microsoft 365. This account can be a Microsoft account, or work or school account. I forgot the account I use with Office
After signing in, follow the steps:
You signed in with a work or school account
1. From the home page select Install apps (If you set a different start page, go to aka.ms/office-install.)
2. Select Microsoft 365 apps to begin the installation.
  
  The 64-bit version is installed by default unless Microsoft 365 or Office detects you already have a 32-bit version of Microsoft 365 or Office (or a stand-alone app such as Project or Visio) installed. In this case, the 32-bit version of Microsoft 365 or Office will be installed instead.
  To change from a 32-bit version to a 64-bit version or vice versa, you need to uninstall Microsoft 365 first (including any stand-alone Microsoft 365 apps you have such as Project of Visio). Once the uninstall is complete, sign in again to www.office.com and select Other install options, choose the language and version you want (64 or 32-bit), and then select Install. (See Install Visio or Install Project if you need to reinstall those stand-alone apps.)
This completes the download of Microsoft 365 to your device. To complete the installation, follow the prompts in the "Install Microsoft 365" section below.

Depending on your browser, select Run (in Microsoft Edge or Internet Explorer), Setup (in Chrome), or Save File (in Firefox).

If you see the User Account Control prompt that says, Do you want to allow this app to make changes to your device? select Yes.

The install begins.
Your install is finished when you see the phrase, "You're all set! Office is installed now" and an animation plays to show you where to find Microsoft 365 applications on your computer. Select Close.

Tip: You can download and install the Microsoft Support and Recovery Assistant to help with Microsoft 365 installation issues on a PC. For more information, see About the Microsoft Support and Recovery Assistant.

If you're having an installation issue such as Microsoft 365 taking long to install, try Need help? for a list of common issues.

To open an app, select the Start button (lower-left corner of your screen) and type the name of an app, like Word.

If you have Windows 8.1 or 8.0, type the name of an Microsoft 365 app on the Start screen. Can't find your Office apps?
To open the app, select its icon in the search results.
When the app opens, accept the license agreement. Microsoft 365 or Office is activated and ready to use.

Note: The Activation Wizard appears if Microsoft 365 or Office has trouble activating. Complete the steps in the wizard to finish activation.

Go to www.office.com and if you're not already signed in, select Sign in.
Sign in with the account you associated with this version of Microsoft 365 or Office. This account can be a Microsoft account, or work or school account. I forgot the account I use with Office
After signing in, follow the steps that match the type of account you signed in with.
You signed in with a work or school account
1. From the Microsoft 365 home page select Install Office (if you set a different start page, go to aka.ms/office-install).
2. Select Office 365 apps to begin the download.
  Note: Don't see an install option after signing in? There could be an issue with your account. Select Need help? from above and review the issues listed in the section Account questions.
Follow the instructions below to complete installing your Microsoft 365 apps.

Once the download has completed, open Finder, go to Downloads, and double-click Microsoft Office installer.pkg file (the name might vary slightly).

Tip: If you see an error that says the Microsoft Office installer.pkg can't be opened because it is from an unidentified developer, wait 10 seconds and move the downloaded file to your desktop. Hold Control + click the file to launch the installer.
On the first installation screen, select Continue to begin the installation process.
Review the software license agreement, and then click Continue.
Select Agree to agree to the terms of the software license agreement.
Choose how you want to install Microsoft 365 and click Continue.
Review the disk space requirements or change your install location, and then click Install.

Note: If you want to only install specific Microsoft 365 apps and not the entire suite, click the Customize button and uncheck the programs you don't want.
Enter your Mac login password, if prompted, and then click Install Software. (This is the password that you use to log in to your Mac.)
The software begins to install. Click Close when the installation is finished. If Microsoft 365 installation fails, see What to try if you can't install or activate Office for Mac.

Click the Launchpad icon in the Dock to display all of your apps.
Click the Microsoft Word icon (or another Microsoft 365 or Office icon) in the Launchpad.
The What's New window opens automatically when you launch Word. Click Get Started to start activating. If you need help activating Microsoft 365 or Office, see Activate Microsoft 365 or Office for Mac. If activation fails, see What to try if you can't install or activate Microsoft 365 or Office for Mac.

Installation notes

How do I pin the app icons to the dock?

Go to Finder > Applications and open the Office app you want.
In the Dock, Control+click or right-click the app icon and choose Options > Keep in Dock.

Can I install Microsoft 365 on my iPhone or iPad?