You've installed Microsoft 365 on your computer. All other Microsoft 365 apps are registered for use. The Microsoft 365 app you selected, such as Microsoft Word, opens for use.If your login is successful, you are prompted to start using the app. When prompted to sign in, enter your email address and password.Double-click a Microsoft 365 application, such as Microsoft Word. From the menu bar, select Go > Applications. Windows Users: Select the Start button and type the name of a Microsoft 365 app, such as Word. Microsoft 365 installs and notifies you when complete.See "Safely Open Apps on Your Mac" from Apple for more details.macOS V13 (Ventura) and later: Go to Apple menu > System Settings > Privacy & Security > Scroll to Security Section. Under the header "Allow applications downloaded from," select "Mac App Store and identified developers." Close the preferences window.Under the header "Allow applications downloaded from," select "Mac App Store and identified developers." Close the preferences window. macOS V12 (Monterey) and earlier: Go to Apple menu > System Preferences > Security & Privacy > General tab.MacOS Users: If you receive an error message stating Microsoft 365 "cannot be installed because it was not downloaded from the Mac App store," follow these instructions. Windows Users: If prompted to allow the app to make changes to your device, select "Yes." You may need to wait for the Microsoft 365 installer to download more files. Most web browsers include a download indicator at the bottom or top of the browser window for you to open the installer. After download is complete, open the Microsoft 365 setup installer.See "Uninstall Microsoft Office for Windows" and "Uninstall Office for Mac." Important: Be sure you have uninstalled any existing Office versions from your computer.Install and Set Up Microsoft 365 (Office) In the upper right, click or tap Install apps. For login details, see "Log in to Microsoft 365." To avoid computer problems, use these resource links to uninstall Office. Important: Uninstall First Warning: If you're installing Microsoft 365 (Office) on a computer with an existing Office version, you must uninstall Office before installing Microsoft 365. You can download and install Microsoft 365 for free on up to five computers (Windows or macOS) and up to five mobile devices. Use Microsoft 365 (Office) on your personally owned devices. To reactivate your Office applications, reconnect to the Internet.Download and Install Microsoft 365 (Office) Software If you don’t connect to the Internet at least every 31 days, your applications will go into reduced functionality mode, which means that you can view or print your documents but cannot edit the documents or create new ones. You should also connect to the Internet regularly to keep your version of Office up to date and benefit from automatic upgrades. Internet access is also required to access documents stored on OneDrive, unless you install the OneDrive desktop app. Im nächsten Schritt gehen Sie zu 'Ressourcen' und klicken dann 'Auf Updates überprüfen' an. For Microsoft 365 plans, Internet access is also needed to manage your subscription account, for example to install Office on other PCs or to change billing options. Starten Sie eine der Anwendungen des Office-Pakets und öffnen Sie wieder ein neues Dokument: Klicken Sie auf die runde Microsoft Office-Schaltfläche und wählen Sie im Anschluss 'Optionen' aus. However, Internet access is required to install and activate all the latest releases of Office suites and all Microsoft 365 subscription plans. You don’t need to be connected to the Internet to use Office applications, such as Word, Excel, and PowerPoint, because the applications are fully installed on your computer.