[horde] Horde sync with iphone stopped working

[Matthias]

Am Sonntag, den 23.06.2013, 13:32 -0400 schrieb Michael J Rubinsky:
> Quoting Matthias Prinz <Matthias at mpb45.de>:
> 
> > Hello list,
> >
> > I've installed horde via pear, newest version, all modules
> > updated on Debian wheezy.
> >
> > I would like to sync Calendar and Contacts
> > to the following clients:
> >
> > Outlook via funambol: works fine
> > ipad via activesync: works fine
> > iPhone 5 via activesync: did work, stopped working!
> > iPhone 4 via activesync: did work stopped working!
> >
> > Unfortunately I have got no clue if or what has changed
> > or was changed by me that could have caused the sync
> > to not restart again.
> >
> > I've attached the last lines of the logs for the iphones.
> > If you need more lines or other information, please let me know.
> 
> Nothing out of the ordinary in either of those logs.

OK. But what can I do to find out, why these iphones do not sync any
more? Why did they stop syncing then?

I've checked the apache logfiles. For the ipad there is an
OPTIONS-Log-entry followed by lots of POST-entrys.
For the iphones there were the same entrys (OPTIONS, POST) until
the stopped syncing. From that point on only OPTIONS-entrys.
What is not working here?

Thanx for any help.
-- 
Dr. Matthias Prinz
Bettinastraße 45, 60325 Frankfurt am Main