Christen Rolf - 2017-09-22

Sinec few days my snchronization on table (surface 4/windows 10/outlook 365) is not running anymore. Following error message appears:
CalDavSynchronizer.DataAccess.WebDavClientException: Response status code does not indicate success: '404' ('NotFound'). Message:
<?xml version="1.0" encoding="UTF-8"?>
<errors xmlns="http://schemas.google.com/g/2005">
<error>
<domain>GData</domain>
notFound
<internalReason>Not Found</internalReason>
</error>
</errors>
What can I do to fix it?
Thanls for support