I have been a MS Office power user since its first release. Because this question mentions several complex elements that might vary based on each user's circumstances, it looked like a troubleshooting-like question.
Please ensure that questions don't invite back-and-forth interaction beyond the normal post-clarification / improvement.
After the question was edited, it was reopened.
Remember that if the question gets answers and you or a commenter have follow-up questions, those questions should be posted as new questions on a site where each question is on topic. I.E. In Web Applications SE, questions about Word Online are on-topic, but the following are off-topic:
- General questions about the equations editors over the different versions of MS Word.
- Asking for recommendations for Word Online plug-ins / add-ons.
If you need help finding a site to ask questions about something off-topic in Web Applications SE, request a site recommendation on Meta Stack Exchange.
There is always the option to invite people having +20 rep to participate in the question to have a conversation in a chatroom. A mod might invite new users.