No Sync with BlackBerry 10

No Sync with BlackBerry 10

Hey,

I am trying to get my Zoho Mail to sync (Exchange) with my new BlackBerry 10 (Z10).
Unfortunately it does the initial sync but hen stops to sync. No errors shown. Syncing Gmail works fine ...

I already contacted the support a few weeks ago and never got an answer back.
Just wanted to give this another try before changing ...

Regards,