Office 365 Unlicesed Product : Sometimes it happens that even after a successful completion of Office 365/2019, when you open MS Word, MS PowerPoint, MS Excel, Publisher, Outlook, OneNote, Infopath, or Lync, an error message pop up on your screen, “ Unlicensed Product,” which is associated with the activation error. The users usually tend to ignore this message, and otherwise some important functions will be lost. If you are working in Office 365, you need to correct the issue within 30 days, whereas Office 2019 Home & Student permits 5 days for the activation. Let us discuss some tips to remove the error.