Other features or issues related to Microsoft Partner Center
When building a Windows Store app (OEM) that another company will publish under their store account, you need to generate the .msixupload bundle using the account of the company that will publish the app. This is because the app package upload file is tied to the publisher's account in the Microsoft Partner Center. If you generate it using your account, it will not be valid for submission under the other company's account.
References: