Accounts :: Must Email Password Be Same As Desktop Password?

I set up the user account using my Microsoft email account. I would like to use a different password on my desktop vs the email password. My email password since it is accessible via web is strong 16 characters long, random characters password and changed often. I would like to change the desktop password to something I can remember, still strong, but I don't change it as often since you have to get physical access to my desktop.

I assumed once I linked to the Microsoft account I could change the password on the machine without it changing my email password.

Is this not possible? I would prefer not to have to lower the security of my email account just to accommodate Windows 8. Never a problem before as my email clients stored the password.