I'm facing the same exact issue as the one described in this (locked) thead: OneNote Online search not working Whatever I put on the "search my notebooks" box here the answer is always "No search results found" Looks like it could be a global issue. Under my account, global (all notebooks) search works fine using the desktop app and the smartphone app, the issue is only when using OneNote online. I've opened a support chat session (reference number 1018366434) and I've been suggested to reopen a thread here, so here I am.
I don't want to have to install or have a locally installed OneNote to access all our OneNote files, which are all properly stored in OneDrive, and thereby accessible from any machine I currently have access to. I should just have to login to Office.com and then open my OneNote and find all my content.