Two suggestions come to mind.
1: Log out of all licensing and then activate the suite using another Microsoft ID.
2: Check to make sure your machine is not enrolled in an MDM that is enforcing an Outlook profile.
The first is that you should be able to go to Outlook, choose the Tools menu > Accounts. When the Accounts pane opens, select the account you do not want and press the – button. If in the "new" Outlook view, this should ask if you would like to sign out. Choose to do so. Once you have disconnected from the account, then quit all Microsoft tools and run the Microsoft License Removal tool. https://go.microsoft.com/fwlink/?linkid=849815. This should remove the license information for the core Microsoft suite. Please note, Microsoft suite is licensed in three phases. Word, Excel, PowerPoint, and OneNote share one activation step. OneDrive is a second. And Teams is the third. If you are using OneDrive, use the embedded reset tool inside the app bundle. Go to the Applications folder and right-click on OneDrive.app. From the contextual menu, select Show Package Contents. Once you are inside the app bundle, navigate to Contents/Resources and double click on the file ResetOneDriveAppStandalone.command. This will open Terminal and run a series of actions with will reset OneDrive to defaults. Once you have removed the licensing, start by launching Word and then sign in with your new Microsoft ID (I will assume you have a O365 Business Standard or better license). Confirm that you can create a save a Word document. This action should activate the core suite. Now open Outlook and, assuming the account you activated with is the account that you want to use for email, it should ask if you would like to add the account to Outlook.
Ok, the second thought is that your Mac is enrolled in an MDM and you have an Outlook profile enforcing the creation of the account. To check this, I will assume you are on Ventura. Open System Settings > Privacy & Security. Scroll to the bottom and look for Profiles. If you have some installed, click on Profiles and look through the list to see if you have one that enforces the account. See if it is removable. It likely is not but you can try anyway. If the profile is installed, you will need to reach out to your MDM admin and ask that the profile be removed. If it is enforced on the machine, then you will always have access to that account. Is the computer your computer or does it belong to the company that you were working with?
Hope this is helpful.
