Real fix in git. To hotfix production servers the patch from https://issues.kolab.org/show_bug.cgi?id=5190#c2 can be used.

Generating a cert with gpgsm works for me with version 2.0.22 on Ubuntu 14.04.

Note to self. FAI message object have PidTagAssociated=true property set. https://msdn.microsoft.com/en-us/library/ee202536%28v=exchg.80%29.aspx

Hmm... I'm not so sure. According to RFC5545 it is not valid.

Code improved and pushed. However, I dodn't test it on real GSSAPI-configured environment.

Commited as rRPKd49a4457b1a

Fixed also some Kolab plugins issues. I consider this ticket issue fixed.

Also not reproducable with current KE14 - iRony DAV Server 0.2.8SabreSabre VObject 2.1.3.

I'm unable to reproduce the initial issue in Kolab:Development. The TRIGGER property is not broken when importing ics using iRony and then exporting it there.

Oops. It looks that "P" is valid. I'll look for the issue in other places.

I found it's libkolabxml issue, see T670. However, some code alignments and workarounds still needed in libkolab and libcalenaring plugins.

1. kolab-syncroton does not support Reminder=0 now, need to be fixed.
2. There are issues in Roundcube UI. While you can set alarm to "0" when you visit the event again there are small glitches in the alarm description and edit field. The reminder message is not displayed.

BTW, when adding such event via Roundcube the TRIGGER is correctly saved as -PT0M. So, it looks that iRony/SabreDAV is doing something wrong here.

Yes, it does.