Dear Mike P..,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
We are sorry to hear that you’re having trouble when trying to add developer tab to the ribbon in Word 365. I deeply understand the inconvenience caused and apologize for it.
We appreciate your understanding that sometimes the initial response may not resolve the problem immediately. However, we can work together to narrow down and resolve the situation. So, for further troubleshooting, could you please provide the information below:
- Could you please let me know if you have tried right-clicking on the Word shortcut, selecting 'Run as administrator,' and then checking if you can now add the Developer tab to the ribbon?
- Could you please let me know if the issue still persists when you are running the Word app in safe mode? Open Office apps in safe mode on a Windows PC - Microsoft Support
- Could you please provide me the specific OS version the affected are using?
- Could you please provide me the specific Office app version the affected are using? About Office: What version of Office am I using? - Microsoft Support
Once again, I apologize for the inconvenience this has caused. We appreciate your patience and understanding and thank you for your time and cooperation.
Sincerely,
Ralph Chawatama | Microsoft Community Moderator