I googled the error and found directions that worked that involved deleting all keychain records that included 'office' but, unfortunately, that didn't work.Not exist or you might not have permission to open it.'), although, I was able to open it in OneNote online. I logged onto onenote online and saw all my notebooks and tried to open one from the menu with the desktop app and got an error that I may have no longer had permissions ('We couldn't open that location. Times, then I opened up to a blank notebook. I selected 'Sign in with a different account' in which I had to sign in three On signing back in, I was prompted to use a different login. Last week, using onenote, I had trouble syncing for whatever reason so I signed out and attempted to sign back in.