By USTrustedTech Editorial Team
Quick answer: How do you upgrade Office 2021 to Office 2024?
To upgrade Microsoft Office 2021 Home & Business to Microsoft Office 2024 Home & Business, obtain the appropriate new license, back up your documents and Outlook data, and follow the retail installation instructions for your purchase. To upgrade Microsoft Office 2021 Pro Plus to Microsoft Office 2024 Pro Plus, follow the deployment and activation process appropriate to your volume-license entitlement.
These are separate upgrade paths. Do not use retail redemption instructions as a universal method for Pro Plus, or volume-activation instructions for Home & Business. An Office 2021 product key should not be assumed to activate Office 2024.
Which upgrade path applies to you?
Path 1: Office 2021 Home & Business to Office 2024 Home & Business. Use the setup process for your retail edition and platform.
Path 2: Office 2021 Pro Plus to Office 2024 Pro Plus. Follow the licensing, deployment, and activation instructions for your organization or purchase.
The Windows instructions below do not replace Office for Mac instructions. Home & Business users on a Mac should use the Mac installer and requirements. Do not use the Windows Pro Plus deployment process on macOS.
If you are still choosing a version, read our Microsoft 365 versus Office 2024 comparison before deciding.
Before either upgrade: Protect your files and Outlook data
- Save your work and close Office applications.
- Back up Word documents, Excel workbooks, and PowerPoint presentations to a separate location.
- Confirm cloud files have finished syncing and test that your backups open.
- Record your current Office edition and whether it is 32-bit or 64-bit.
- Check important add-ins, macros, templates, and business integrations for compatibility.
- Identify your Outlook account type and any local archives. Do not assume all historical email exists on your provider’s server.
- Record essential Outlook settings and follow the backup procedure appropriate to your account and local data.
Your documents are separate from the Office applications. Nevertheless, backups are essential, and settings or Outlook configurations should not be assumed to transfer automatically.
Path 1: Upgrade Office 2021 Home & Business to Office 2024 Home & Business
1. Confirm your platform and license
Check that your new purchase is Office 2024 Home & Business for the computer and platform you intend to use. Verify the current system requirements. Keep your purchase information and access to the Microsoft account associated with your retail license available.
2. Prepare the correct installer
Follow the redemption and download instructions supplied with your retail purchase. If the license is already associated with a Microsoft account, use that account’s installation instructions. A volume-license installer is not a universal substitute.
3. Remove the previous installation where required
Follow the removal instructions appropriate to your existing installation and the new setup process. Do not assume Office 2021 and Office 2024 can be kept side by side. Have your backups and new installation instructions ready before removing Office 2021.
4. Install and activate Office 2024 Home & Business
Run the appropriate installer and complete the supported retail activation process. If the installed edition does not match your purchase, stop and check the installation instructions instead of trying unrelated keys.
5. Verify your work
Test documents, spreadsheets, presentations, add-ins, and Outlook. Confirm access to email, calendars, contacts, and local archives before deleting any backups.
Path 2: Upgrade Office 2021 Pro Plus to Office 2024 Pro Plus
1. Confirm your license entitlement
Confirm that your organization or purchase provides the appropriate entitlement to Office 2024 Pro Plus. An existing Office 2021 Pro Plus installation does not by itself establish rights to the 2024 edition.
2. Check requirements and architecture
Check current Microsoft requirements and your add-in compatibility. Microsoft’s volume deployment guidance requires Office products on the same device to use the same architecture. Review existing Project or Visio installations before changing between 32-bit and 64-bit Office.
3. Remove previous Office versions
Microsoft’s deployment guidance for the 2024 volume-licensed suite instructs administrators to uninstall previous Office versions before installation. Removal methods depend on the installation technology. The deployment tool’s RemoveMSI option should not be assumed to remove every Office installation.
4. Deploy Office 2024 Pro Plus
Use the Office Deployment Tool with the configuration approved for your licensed edition. The configuration controls the product, architecture, languages, and other deployment choices. Do not copy a generic script that might remove applications you still need.
5. Complete volume activation
Activation can use Multiple Activation Key (MAK) or Key Management Service (KMS), depending on your licensing arrangement. Follow the method assigned to your installation. Retail account redemption is not a universal activation route for Pro Plus.
6. Test applications and integrations
Office 2024 Pro Plus includes Access, Excel, OneNote, Outlook, PowerPoint, and Word. Test databases, macros, templates, and add-ins as well as everyday documents. Publisher is not included in this 2024 suite, so workflows that depend on it need a separate transition plan.
Installation and activation resources
For related preparation, see our Office 2024 installation guide and Office 2024 activation guide. Use only the instructions that match your edition and license type; retail account-based steps should not be treated as Pro Plus volume-activation instructions.
Common upgrade problems
The license will not activate
Compare the installed edition with your purchase or organizational entitlement. Check that the installation and activation methods match. Avoid third-party activation scripts and never post your key publicly.
An add-in or macro stops working
Check the vendor’s supported versions and architecture. Test a copy of the affected file rather than your only working copy. Do not weaken security controls simply to restore an older workflow. ActiveX controls are disabled by default in the 2024 volume-licensed suite, which can affect older solutions.
Outlook appears to be missing email
Check the account, profile, synchronization status, and local archives. Preserve backups while investigating. Ask your email administrator or support provider for account-specific recovery instructions.
Frequently asked questions
Can I upgrade Office 2021 Home & Business to Office 2024 Home & Business?
You can move to the newer edition with the appropriate license and compatible computer. Back up your data and follow the retail setup instructions for your platform.
Can I upgrade Office 2021 Pro Plus to Office 2024 Pro Plus?
You can migrate with the appropriate entitlement. Follow the deployment and volume-activation instructions that apply to your organization or purchase.
Can I activate Office 2024 with my Office 2021 key?
Do not assume so. Confirm that your license or agreement specifically provides entitlement to Office 2024.
Will upgrading delete my documents?
Documents are separate from installed applications, but you should still back them up and test important files after migration. An upgrade is not a guarantee against data loss.
Will Outlook settings transfer automatically?
Do not rely on automatic transfer. Record your configuration, protect local data, and verify your mailbox, archives, calendar, and contacts afterward.
Is Office 2024 Pro Plus installed the same way as Home & Business?
No. Home & Business follows its retail setup process. Pro Plus follows the deployment and activation procedures appropriate to its volume-license entitlement.
Can I mix 32-bit and 64-bit Office products?
Microsoft’s volume deployment guidance requires all Office products on a device to use the same architecture. Review compatibility before making a change.
Choose the matching edition and upgrade carefully
For Office 2021 Home & Business users, prepare the move to Office 2024 Home & Business around your retail license and platform. For Office 2021 Pro Plus users, prepare the move to Office 2024 Pro Plus around your licensing entitlement and deployment configuration. Both paths start with backups and finish with testing your real workflows.
Need help with installation or activation for your USTrustedTech purchase? Contact support@ustrustedtech.com. Never share passwords or full product keys in public comments.
