Have tried everything, unfortunately, still no e-mails.
Devices look like this:
Android | Android/4.3-EAS-1.3Sun, 09 Mar 2014 00:47:33 +0000 4048... Provisioned
WindowsOutlook15 | Outlook/15.0 (15.0.4551.1507; MSI; x86)Sun, 09 Mar 2014 00:34:38 +0000 0 Not Provisioned
I don't know...
Thank you for your detailed answers! Now it is partly working: contacts and calendar are ok, but no emails. Outlook 2013 says: "Waiting for Server". Android shows no email, without error.
Schöne Grüße!
Running Horde 5.1.5 on CentOS 6.5 with Plesk 11.5.30 Update #33.
I have completed the steps outlined by Atramasis and have come to the same result as MarkusSc.
After change owner of .horde.shadow to apache.horde_sysgroup, the error-message in browser disappear,
when opening...