ActiveSync with Windows 10 Mail + Calendar app doesn't work

ActiveSync with Windows 10 Mail + Calendar app doesn't work

ActiveSync is working fine on my Android Device and on desktop with Outlook 2016 using 'msync.zoho.com' as server.
But it doesn't with the integrated Microsoft apps for Mail and Calendar. It's no problem to configure the account (using 'msync.zoho.com') but it won't sync. I get an error message - translated something like this:

An error occured
There is a problem with the server or your network connection. Try again later.

Error code: 0x85010005

Any ideas?

Thanks in advance
Andreas