Hi there,
I have installed Kontact 5.3.0 on an opensuse Leap 42.2 and tried to hook up to a kolab 16 server.
Email works fine.
Groupware folders (contacts, calendars, tasks and notes) are not displayed in the Kmail folder hierarchy and not offered as a source in Kaddressbook, Korganizer, Notes etc.
However, in the kolab roundcube client, they are perfectly visible and they perfectly sync with all kinds of mobile devices (android, iPhone, iPad).
Only Kontact & friends seem to fail on the Kolab groupware functionality.
The Kontact handbook says:

" Options only relevant to DIMAP (Kolab server)
After having configured your Disconnect IMAP account, you need to activate the Groupware functionalities and set-up the Misc page for KMail.
In the Misc page, of the Configure dialog, choose the Groupware tab. Check the Enable IMAP resource functionality option and select Kolab (XML) as Format used for the groupware folders. The Resource folders are in account combo-box should be set on the Receiving (kolab user) account of your choice (if you happen to have several accounts). You may if you wish hide the groupware folder by checking this option...."

In my installation, there is no Groupware tab and no IMAP resource functionality to enable and select a format.
Who can help?
Brgds
Axel

You need to create a specific account type called "Kolab Groupware Resource". Did you use that, or the "IMAP server" (more generic)?
If all is OK, on the next mail check you should get a new calendar in KOrganizer and new contacts in KAddressbook. But bear in mind you have to be subscribed to the special Kolab folders for this to work (Configuration, Files, etc...).

einar wrote:You need to create a specific account type called "Kolab Groupware Resource". Did you use that, or the "IMAP server" (more generic)?
-> The resource I added was indeed the "Kolab Groupware Resource".

If all is OK, on the next mail check you should get a new calendar in KOrganizer and new contacts in KAddressbook. But bear in mind you have to be subscribed to the special Kolab folders for this to work (Configuration, Files, etc...).

-> All of these folders were visible for a first subscription and disappeared as expected due to their groupware related annotations (i.e. event, contact, configuration, notes, files)

Additional info:
All groupware functions worked under Kolab 3.4
The respective folders stopped to be detected by the groupware apps in Kontact (addressbook, calendar, notes, ...) after the server was upgraded to Kolab 16.1. Just to be sure, I completely deleted the "old" resource and added a new one. Same problem.
Kolab webmail (roundcube) works just fine, ActiveSync as well.
It looks like Kmail detects the groupware folders well (and therefore makes them invisible in the mail component) but the other programs do not detect them.

Are you sure it's not the "guam" proxy that is causing you problems? Can you try disabling guam and using Cyrus directly?

Bingo, it was indeed Guam having messed it up.
Even if I remove the groupware filter section in the Guam sys.conf, the folders are still invisible.
Disabling guam (chkconfig guam off) and activating cyrus to listen on 143 and 993 has solved the problem.

The following line has to be commented out in /etc/cyrus.conf:
# imaps cmd="imapd -s" listen="127.0.0.1:9993" prefork=5

Two new lines have to be added:
imaps cmd="imapd -s" listen="993" prefork=5
imap cmd="imapd" listen="143" prefork=1

Thanks for the hint!