Fact · Dictation in your apps
Microsoft says that if the Dictate button is grayed out in OneNote, you should make sure the note is not in a read-only state.
Checked against its source on October 17, 2026
In the source's own words
“Make sure the note is not in a Read-Only state.”
Dictate your notes in OneNote, Microsoft Support, 2026, Troubleshooting: Dictate button is grayed out.
Open the original- What it does not show
- The page gives no other steps for a grayed-out button.