In case others find this, I think I just found a solution (from [this blog post][1]) that lets you force the browser back to showing the Light version of OWA with 40-some messages listed at one line per, instead of the ridiculous modern tile version where you see 4.  Directly after the **/owa/** part of the URL you are using, paste in **?exsvurl=1&layout=light&wa=wsignin1.0**.  So if you are getting your webmail on office365, your URL will look like this:

     https://outlook.office365.com/owa/?exsvurl=1&layout=light&wa=wsignin1.0

Edit:  Testing it a bit, it seems like the only necessary part of that is **?layout=light** ... So try:

    https://outlook.office365.com/owa/?layout=light

  [1]: https://blogs.technet.microsoft.com/ptsblog/2013/10/21/url-for-office-365-outlook-web-app-light/