How can I syncronise my Outlook with my DETEK50?

You didn't say whether you mean Office Outlook (which version?) or Outlook.com. I have Outlook 2016 on my Windows 10 PC and I sync my contacts and calendar through Outlook.com to my DTEK50. This happens automatically whenever a change is made and is a much better method than using Link on BB10.

You want to make sure that your default account for Contacts and Calendar on your DTEK is Outlook.com I think there was recent change in the Contacts or Calendar app to set the default account, but when I set up mine I had to make sure that my Outlook.com account was the first (or oldest) account setup in the Hub.