For the issue of error 440 for VTC Webmail in Chrome, it 

If it still occurs after updated to latest version, seems this method can resolve the captioned problem.

However, please note that I guess this setting should be related to privacy and cross-site tracking.

 

  1. Open Google Chrome
  2. Type chrome://flags/#reduced-referrer-granularity in address bar
  3. Change Default to "Disable".
  4. Click "Relaunch".




Ref: https://www.reddit.com/r/exchangeserver/comments/iyirls/owa_440_error_in_chrome/

Ref: https://developers.google.com/web/updates/2020/07/referrer-policy-new-chrome-default