The reason why the synchronisation does not occur at startup is because Thunderbird 10 has not yet setup some objects at that point. We still have to find a good way of trapping this, probably via a hack.

Meanwhile, you can still synchronise your addressbooks manuyally via the synchronise button. If that button is not visible, you may add it by reconfiguring the toolbar in the addressbook.

2-Effects:

-1- The error message does not appear after startup, it appears in the error console after open the address book window and select the carddav adressbook defined before.

-2- Using the synchronize button does nothing so my first thaught was that the error in -1- prevents that the synchronization will be done ....

Can you enable browser.dom.window.dump.enabled in the configuration and restart Thunderbird from the command-line to see if you can see any error showing up?

During a normal startup sequence, you should see something like this:
*** new sync: 1
1/sync with http://wolfomachine.local/SOGo/dav/wsourdeau/Contacts/personal/...
ctag matches or drop operation
url: http://wolfomachine.local/SOGo/dav/wsourdeau/Contacts/personal/
code: 207
1/sync with http://wolfomachine.local/SOGo/dav/wsourdeau/Contacts/personal/ has ended.

If this does not show dyring startup, please check also when synchronising manually...

Thanks for the very quick response, but I need some advice how to do that.

In my thunderbird there is no variable browser.dom.window.dump.enabled

Howto enable that?

Open "about:config" by klicking on button "Config editor..." under "Edit" --> "Preferences" --> "Advanced" --> "General".
Klick on button "Yes, I'll be careful, I promise!

Then right click on the list and choose "New >" --> "Boolean".
Type "browser.dom.window.dump.enabled" (without the quotes).
Klick on "OK".
Select value "true".
Klick on "OK".

No errors showing on startup but I think I do something wrong because there are no messages at all on the command line. So let us discuss if I made it right:

-1- I defined the variable browser.dom.window.dump.enabled with value true
-2- I started a command line window with cmd (Windows Vista 32-bit)
-3- I changed to the directory Mozilla Thunderbird
-4- I started thunderbird.exe with no additional command line variables

=> No error messages or other information is shown in the cmd window

=> Do I make a mistake or is it only possible under a shell in linux ?

Ah, from Windows, you need to launch thunderbird with "-console".

no change and no additional information what is the mistake?

I tried to start thunderbird in a console which has administrator rights => same behavior.

What I see is that a window is coming up and closes very fast (the console window?).

Also redirecting it to a file in the tmp directory. the file has no entries ...

First the good news:
I created a new windows user on the machine (making the problems) and the
addressbooks which are on a local server can be read and updated!

The bad news:
-1- I put a third addressbook on a remote server (at my home) and this works not!

Hope this helps solving the issue ...

Sorry forgot something: The error console has the following entries after startup of thunderbird:

Warnung: Fehler beim Verarbeiten des Wertes für 'clip'. Deklaration ignoriert.
Quelldatei: resource://gre-resources/ua.css
Zeile: 274

Fehler: Gloda.myContact is null
Quelldatei: resource:///components/glautocomp.js
Zeile: 286

2012-02-24 11:37:50 gloda.ds.qfq ERROR Exception: TypeError: Gloda.myContact is null

Fehler: uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIMsgSendLater.hasUnsentMessages]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://messenger/content/mail-offline.js :: <TOP_LEVEL> :: line 81" data: no]

If I synchronize the not working address book and look to the server log, I can see that there was a contact between sogo and the server but nothing more.

The server log has an entry for ...PROPFIND...

Hope this helps ...

I made a full new installation on another windows pc and the problem remains!
Sorry but if I cannot see my addresses from home, sogo is not usable for me.

I tested it today with Thunderbird 15.0 and SoGo Connector 10.0.3 and get the following error in the error consol

Zeitstempel: 06.09.2012 14:21:51
Fehler: An error occurred updating the cmd_delete command: [Exception... "'[JavaScript Error: "cards[i] is null" {file: "chrome://messenger/content/addressbook/abResultsPane.js" line: 124}]' when calling method: [nsIController::isCommandEnabled]" nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" location: "JS frame :: chrome://global/content/globalOverlay.js :: goUpdateCommand :: line 86" data: yes]

It occurs on a Windows7 as well as on a Mac OS X Lion Computer

The problem remains!
Quelldatei: chrome://global/content/globalOverlay.js
Zeile: 92

Any hope that someone will have a look to that?

SOGo Connector 10 is to be used with TB 10 ESR, not TB15.

Try with TB17 ESR or even with TB24 with the latest extensions.