[horde] Horde Activesync with Outlook 2013/2016: duplicate folders on folder creation

[Torben Dannhauer]

Hi,

as EAS14 support was added to Horde to support Outlook via Activesync, your
described issue happend quite often. Michael added a workaround which fixed
the issue on my side perfectly. I observe several users including myself
using Horde and Outlook via EAS. In the last time, I haven't seen such an
issue seen in any of the accounts. I use solely Dovecot. Does it happen with
accounts served by Dovecot or Exim? 

Thanks,
Torben


-----Ursprüngliche Nachricht-----
Von: horde [mailto:horde-bounces at lists.horde.org] Im Auftrag von Hendrik
Noack
Gesendet: Freitag, 11. November 2016 10:14
An: horde at lists.horde.org
Betreff: [horde] Horde Activesync with Outlook 2013/2016: duplicate folders
on folder creation

Hello everbody,

 

I did not find anything on the internet on that topic, so I hope maybe
someone has seen this behaviour before.

 

We are using Debian 8 with Dovecot, Exim and Horde on top. The Horde
installation is up to date. Our clients are using Outlook 2013/2016 to
connect via Horde activesync.

We also have a bunch of iOS and Android devices.

 

It’s not always happening, but too often to be just a rare bug. When an
Outlook client creates a new mail folder, the folder is created, then a sync
against horde is started and the very same folder is immediately sync‘ed
back as another new folder. The client now has: folder and folder [1] in the
database. Right after the appearances of the duplicate folder a new sync is
started that clears out all mails, contacts and appointments from that
client, so that Outlook appears to be empty. A reset in activesync for that
client on the server side does not clear this problem, I have to delete the
local .ost cache for that client. The next sync will then bring back all
mails, contacts and appointment. The duplicate folder is also gone, as it
was never duplicated on the server side.

 

Creating a folder in IMP always works as it should, I have never seen
duplicates in Outlook when I created the folder in IMP.

 

My guess is, that there must be something going terribly wrong sometimes
when Outlook tries to create a new folder via activesync. Or maybe this a
problem with my Dovecot configuraiton, but like I said, the duplicates never
reach the server.

 

Any ideas would be much appreciated.

 

 

Mit freundlichen Grüßen / Best regards
   
Hendrik Noack

   

--
Axxedia IT GmbH

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Tel +49 7159 4979763
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