Article ID: 2390518 - View products that this article applies to.
Not sure what release of Office 365 you're using? Go to the following Microsoft website:
Am I using Office 365 after the service upgrade?
Office Professional Plus messages appear before you start an Office application.
This behavior occurs by design. You may receive these messages when Office Professional Plus is installed on the local computer and has not been activated.
To work around this behavior, you can activate Office Professional Plus or remove Office Professional Plus.
To activate Office Professional Plus, follow these steps:
Still need help? Go to the Office 365 Community
Article ID: 2390518 - Last Review: February 27, 2013 - Revision: 27.0