[horde] Problems with Active Sync and Outlook 2013/2016

[Lucas (wb7)]

Hi everyone,

I've set up a new Horde installation from PEAR today. It's working like a
charm, but a little issue is there: Active Sync is not working with Outlook
2013 nor Outlook 2016. I've installed everything, configured Outlook
(auth-check successful) and from now there is the problem, that Outlook is
not syncing any mails. The INBOX is empty in Outlook, but in IMP there are
10 Mails.

I've added the Active Sync log here: http://pastebin.ca/3212600
Sorry for the pastebin link, but these are 6000 lines and I wanted to show
that a block is repeated every try...

Does anyone have an idea?

Thanks!

Regards,
Lucas