Hi Jan,
Thank you for your interest in AkrutoSync. AkrutoSync will synchronize your contacts, calendar, tasks and notes between Outlook and your devices. It works on Android, Windows phones, and iOS devices (iPhone/iPad/iPod Touch).
As long as your HTC phone is either an Android with OS version 5 or 6 or even lower (2.2 is the oldest version that is compatible), it can sync with your Outlook 2013 (computer to phone and vice-versa).
You can try the trial version and download it from https://www.akruto.com/get-akruto-sync/
Alf Delola