Please note - For those who couldn't get this to work, know that everyone's computer settings can be different, hence it is not a one-size fits all. You should post your own thread to start the troubleshooting process unique to yours.
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A few common different scenarios -
Scenario 1
If you only see "manage" instead of "disconnect", you are on the WRONG settings page.
Do NOT go to Settings > Accounts > Emails & Accounts.
Instead, go to Settings > Accounts > Access Work or School.
Alternatively, you can also launch Powershell in admin mode and run the following code: ***Get-ItemProperty -Path "C:\Users\\AppData\Local\Packages" | ForEach-Object {
Remove-Item -Path "$_\Microsoft.AAD.BrokerPlugin*" -Recurse -Force | Out-Null
}
Scenario 2
You are not allowed to disconnect it.
It can mean your account is not an admin user, or you are using the work/school account to sign into the computer right now, hence you cannot disconnect the one you are currently on. Just like you cannot take the chair out when you are sitting on it.
In this case, you need to make sure you are signing in with the local admin user, or the personal Microsoft account user that has admin right on the computer.
Scenario 3
You cannot find these settings at all.
Perhaps your computer is in an organization domain still - in that case, your computer is still under specific organization group policies, which can be unique to each of their own, they can have group policies to hide/show settings, allow/not allow certain things. Only the organization IT can help you with those, or if you are no longer with the organization, you have to reset/clean install to get out of such environment.
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Once again, start your own thread if the method doesn't work, because it means there can be something unique to your computer/settings that prevents it from working and it will require individual attention to troubleshoot.
Good luck!!