Note: Your account needs lớn be assigned a license that includes Office products in order to download and install.
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Sign in to tải về Office for PC
Sign in with the tài khoản you associated with this version of Office.
After signing in, follow the steps:
From the Office 365 home page selectInstall Office apps

SelectOffice 365 appsto begin the installation.
Note:The 64-bit version is installed by default unless Office detects you already have a 32-bit version of Office (or a stand-alone Office app such as Project or Visio) installed. In this case, the 32-bit version of Office will be installed instead.To change from a32-bit version to lớn a 64-bit versionor vice versa, you need touninstall Office first (including any stand-alone Office apps you have such as Project of Visio). Once the uninstall is complete, sign in againand selectOther install options, choose the language và version you want (64 or 32-bit), & then selectInstall.
This completes the tải về of Office lớn your device. Lớn complete the installation, follow the prompts in the "Install Office" section below.
Install Office
Depending on your browser, selectRun(in Edge or mạng internet Explorer),Setup(in Chrome), orSave File(in Firefox).
If you see the User account Control prompt that says,Do you want lớn allow this phầm mềm to make changes khổng lồ your device?selectYes.
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 lớn show you where lớn find Office applications on your computer. SelectClose.

Activate Office
To mở cửa an Office app, select theStartbutton (lower-left corner of your screen) and type the name of an Office app, likeWord.
If you have Windows 8.1 or 8.0, type the name of an Office phầm mềm on theStart screen.
To open the Office app, select its icon in the tìm kiếm results.
When the Office tiện ích opens, accept the license agreement. Office is activated và ready khổng lồ use.
Note:The Activation Wizard appears if Office has trouble activating. Complete the steps in the wizard khổng lồ finish activating Office.
Install Office for Mac
Once the tải về has completed, mở cửa Finder, go toDownloads, và double-clickMicrosoft Office installer.pkgfile (the name might vary slightly).

Tip:If you see an error that says theMicrosoft Office installer.pkgcan"t be opened because it is from an unidentified developer, wait 10 seconds và move the downloaded file to your desktop. HoldControl+ click the file to launch the installer.
On the first installation screen, selectContinueto begin the installation process.

Review the software license agreement, and then clickContinue.
SelectAgreeto agree to lớn the terms of the software license agreement.
Choose how you want lớn install Office và clickContinue.
Review the disk space requirements or change your install location, and then clickInstall.
Note:If you want to only install specific Office apps và not the entire suite, click theCustomizebutton & uncheck the programs you don"t want.
Enter your Mac login password, if prompted, and then clickInstall Software. (This is the password that you use lớn log in to lớn your Mac.)

The software begins lớn install. ClickClose when the installation is finished.

Launch an Office for Mac app và start the activation process
Click theLaunchpadicon in the Dock to lớn display all of your apps.

Click theMicrosoft Wordicon in the Launchpad.
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TheWhat"s Newwindow opens automatically when you launch Word. ClickGet Started lớn start activating.

Source: https://support.office.com/en-us/article/download-and-install-or-reinstall-office-365-or-office-2019-on-a-pc-or-mac-4414eaaf-0478-48be-9c42-23adc4716658#InstallSteps=Install_on_a_Mac