Managing personal Outlook.com account settings, security, and privacy
So, this is a OneDrive issue, not an Outlook.com (the topic of this forum) issue, correct? Do you log into your computer using that work address? Windows or Mac? If Windows, open OneDrive's Settings, choose Account and unlink the account from OneDrive. You should then be able to link it up with whatever Microsoft account you wish to use. Note that if your Documents, Pictures, and Desktop folders are being synched through OneDrive, save that data before unlinking or you could lose it.