I need to add my small business email to the Desktop Outlook with a Microsoft Office Home and Business 2024

To add your small business email to the Outlook desktop version with a Microsoft Office Home and Business 2024 license, it's important to note that this license may not include the desktop applications for business accounts. The Microsoft 365 licenses that include Outlook desktop applications typically require a business plan such as Microsoft 365 Business Standard or Business Premium.

Since you mentioned that you activated Office with a personal "hotmail" account, this could be the reason for the "not authorized" error when trying to add your business domain. The desktop version of Outlook requires a proper business account that is licensed for desktop use to add business email accounts.

If your previous installation allowed you to add the business email without issues, it might be due to the different licensing structure of Office Professional Plus 2021, which allows for more flexibility with business accounts.

As for uninstalling and reinstalling Office, you can do this through the Control Panel on your PC:

1. Go to Control Panel > Programs > Programs and Features.
2. Find Microsoft Office in the list, select it, and click Uninstall.
3. Follow the prompts to complete the uninstallation.

After uninstalling, you can reinstall Office using your Microsoft account associated with the correct license. Make sure to sign in with the account that has the appropriate business license for adding your email.

If the issue persists, you may need to check with your domain administrator to ensure that the domain settings are correctly configured for use with Outlook.