Once the progress bar finishes, open any app (like Word). You will be prompted to sign in with your Microsoft account or enter your 25-character product key . Pro-Tip: Use the Office Deployment Tool (ODT)
Restart your computer to clear any hung Windows Update or background installer processes. Final Thoughts Microsoft Office 2021 ProPlus - Online Installe...
To avoid "activation conflicts," uninstall any previous versions of Office or trial versions of Microsoft 365 currently on your PC. Once the progress bar finishes, open any app (like Word)
Use the official link provided with your purchase or via the Microsoft setup portal. Instead of downloading a massive 4GB+ ISO file
The "Online Installer" (often utilizing the technology) is designed to be fast and efficient. Instead of downloading a massive 4GB+ ISO file manually, the small installer stub fetches only the necessary, up-to-date files directly from Microsoft’s servers. Step-by-Step Installation Guide