ZP-1278 Fix caldav backend so the user and (if supplied) domain are picked

up for blank organizer fields when sent to mobile. Released under the Affero GNU General Public License (AGPL) version 3.

src/backend/caldav/caldav.php

@@ -63,6 +63,12 @@ class BackendCalDAV extends BackendDiff {
         $this->_caldav = new CalDAVClient($url, $username, $password);
         if ($connected = $this->_caldav->CheckConnection()) {
             ZLog::Write(LOGLEVEL_DEBUG, sprintf("BackendCalDAV->Logon(): User '%s' is authenticated on CalDAV '%s'", $username, $url));
+            if ($domain == "") {
+                $this->originalUsername = $username;
+            }
+            else {
+                $this->originalUsername = $username . '@' . $domain;
+            }
         }
         else {
             ZLog::Write(LOGLEVEL_WARN, sprintf("BackendCalDAV->Logon(): User '%s' is not authenticated on CalDAV '%s'", $username, $url));