I cross-posted this in the Word Answers Forum as a discussion.
Redirecting

I can verify that if one takes the step of severing internet connection prior to insertion of the image, no Alt text is generated. If the connection is then restored, it is not added unless specifically requested. I wonder what else is going to Microsoft.

I've learned something new, and disturbing, today. I expect that Microsoft is trying to be helpful here but I would prefer to be asked before having anything go off my computer. Is this all "connected services?"