Since the new year 2013, in the Outlook Addin it´s no longer possible to add a date (via the date picker) to a new task. The field is after the choice empty. It´s only possible to write it directly in the field without the date picker but it isn´t very handy
it´s the same issue i think like in the question OUTLOOK DATE
i also use the german version
Thank you for your report, we're looking into this issue and we will address it soon. We're sorry for any inconvenience it has caused you. For now, as a workaround, you could try to use the English version in which this issue doesn't occur.
This issue should now be fixed. Sorry for the inconvenience.