diff --git a/linphone-desktop/src/components/call/CallModel.cpp b/linphone-desktop/src/components/call/CallModel.cpp
index 241443ecd..611965c9d 100644
--- a/linphone-desktop/src/components/call/CallModel.cpp
+++ b/linphone-desktop/src/components/call/CallModel.cpp
@@ -68,6 +68,12 @@ CallModel::~CallModel () {
 
 // -----------------------------------------------------------------------------
 
+QString CallModel::getSipAddress () const {
+  return ::Utils::linphoneStringToQString(mCall->getRemoteAddress()->asStringUriOnly());
+}
+
+// -----------------------------------------------------------------------------
+
 void CallModel::setRecordFile (shared_ptr<linphone::CallParams> &callParams) {
   callParams->setRecordFile(
     ::Utils::qStringToLinphoneString(
@@ -246,10 +252,6 @@ void CallModel::stopAutoAnswerTimer () const {
   }
 }
 
-QString CallModel::getSipAddress () const {
-  return ::Utils::linphoneStringToQString(mCall->getRemoteAddress()->asStringUriOnly());
-}
-
 CallModel::CallStatus CallModel::getStatus () const {
   switch (mCall->getState()) {
     case linphone::CallStateConnected:
diff --git a/linphone-desktop/src/components/call/CallModel.hpp b/linphone-desktop/src/components/call/CallModel.hpp
index 913c80f76..5917f7c28 100644
--- a/linphone-desktop/src/components/call/CallModel.hpp
+++ b/linphone-desktop/src/components/call/CallModel.hpp
@@ -72,6 +72,8 @@ public:
     return mCall;
   }
 
+  QString getSipAddress () const;
+
   static void setRecordFile (std::shared_ptr<linphone::CallParams> &callParams);
   void updateStats (const std::shared_ptr<const linphone::CallStats> &callStats);
 
@@ -103,8 +105,6 @@ private:
 
   void stopAutoAnswerTimer () const;
 
-  QString getSipAddress () const;
-
   CallStatus getStatus () const;
   bool isOutgoing () const {
     return mCall->getDir() == linphone::CallDirOutgoing;
diff --git a/linphone-desktop/src/components/conference/ConferenceHelperModel.cpp b/linphone-desktop/src/components/conference/ConferenceHelperModel.cpp
index 9c2ad7cea..bc9031e0f 100644
--- a/linphone-desktop/src/components/conference/ConferenceHelperModel.cpp
+++ b/linphone-desktop/src/components/conference/ConferenceHelperModel.cpp
@@ -22,16 +22,24 @@
 
 #include "../../Utils.hpp"
 #include "../core/CoreManager.hpp"
+#include "../smart-search-bar/SmartSearchBarModel.hpp"
 
 #include "ConferenceHelperModel.hpp"
 
 // =============================================================================
 
 ConferenceHelperModel::ConferenceHelperModel (QObject *parent) : QSortFilterProxyModel(parent) {
-  setSourceModel(CoreManager::getInstance()->getSipAddressesModel());
+  CoreManager *coreManager = CoreManager::getInstance();
 
-  for (const auto &participant : CoreManager::getInstance()->getCore()->getConference()->getParticipants())
+  for (const auto &participant : coreManager->getCore()->getConference()->getParticipants())
     mInConference << ::Utils::linphoneStringToQString(participant->asStringUriOnly());
+
+  CallsListModel *calls = coreManager->getCallsListModel();
+
+  QObject::connect(calls, &CallsListModel::rowsAboutToBeRemoved, this, &ConferenceHelperModel::handleCallsAboutToBeRemoved);
+  QObject::connect(calls, &CallsListModel::callRunning, this, &ConferenceHelperModel::handleCallRunning);
+
+  setSourceModel(new SmartSearchBarModel(this));
 }
 
 QHash<int, QByteArray> ConferenceHelperModel::roleNames () const {
@@ -40,9 +48,66 @@ QHash<int, QByteArray> ConferenceHelperModel::roleNames () const {
   return roles;
 }
 
+// -----------------------------------------------------------------------------
+
+void ConferenceHelperModel::setFilter (const QString &pattern) {
+  static_cast<SmartSearchBarModel *>(sourceModel())->setFilter(pattern);
+}
+
+// -----------------------------------------------------------------------------
+
 bool ConferenceHelperModel::filterAcceptsRow (int sourceRow, const QModelIndex &sourceParent) const {
   const QModelIndex &index = sourceModel()->index(sourceRow, 0, sourceParent);
   const QVariantMap &data = index.data().toMap();
+  const QString &sipAddress = data["sipAddress"].toString();
 
-  return !mInConference.contains(data["sipAddress"].toString());
+  return !mInConference.contains(sipAddress) || !mToAdd.contains(sipAddress);
+}
+
+// -----------------------------------------------------------------------------
+
+void ConferenceHelperModel::handleCallsAboutToBeRemoved (const QModelIndex &, int first, int last) {
+  CallsListModel *calls = CoreManager::getInstance()->getCallsListModel();
+  bool soFarSoGood = false;
+
+  for (int i = first; i <= last; ++i) {
+    const CallModel *callModel = calls->data(calls->index(first, 0)).value<CallModel *>();
+    const QString &sipAddress = callModel->getSipAddress();
+
+    if (removeFromConference(sipAddress))
+      soFarSoGood = true;
+  }
+
+  if (soFarSoGood) {
+    invalidate();
+    emit inConferenceChanged(mInConference);
+  }
+}
+
+void ConferenceHelperModel::handleCallRunning (int, CallModel *callModel) {
+  const QString &sipAddress = callModel->getSipAddress();
+  bool soFarSoGood = callModel->getCall()->getConference()
+    ? addToConference(sipAddress)
+    : removeFromConference(sipAddress);
+
+  if (soFarSoGood)
+    emit inConferenceChanged(mInConference);
+}
+
+// -----------------------------------------------------------------------------
+
+bool ConferenceHelperModel::addToConference (const QString &sipAddress) {
+  bool ret = !mInConference.contains(sipAddress);
+  if (ret) {
+    qInfo() << QStringLiteral("Add sip address to conference: `%1`.").arg(sipAddress);
+    mInConference << sipAddress;
+  }
+  return ret;
+}
+
+bool ConferenceHelperModel::removeFromConference (const QString &sipAddress) {
+  bool ret = mInConference.removeOne(sipAddress);
+  if (ret)
+    qInfo() << QStringLiteral("Remove sip address from conference: `%1`.").arg(sipAddress);
+  return ret;
 }
diff --git a/linphone-desktop/src/components/conference/ConferenceHelperModel.hpp b/linphone-desktop/src/components/conference/ConferenceHelperModel.hpp
index 337c9dc3a..f69728fda 100644
--- a/linphone-desktop/src/components/conference/ConferenceHelperModel.hpp
+++ b/linphone-desktop/src/components/conference/ConferenceHelperModel.hpp
@@ -24,18 +24,38 @@
 
 // =============================================================================
 
+class CallModel;
+
 class ConferenceHelperModel : public QSortFilterProxyModel {
   Q_OBJECT;
 
+  Q_PROPERTY(QStringList inConference READ getInConference NOTIFY inConferenceChanged);
+
 public:
   ConferenceHelperModel (QObject *parent = Q_NULLPTR);
   ~ConferenceHelperModel () = default;
 
   QHash<int, QByteArray> roleNames () const override;
 
+  Q_INVOKABLE void setFilter (const QString &pattern);
+
+signals:
+  void inConferenceChanged (const QStringList &inConference);
+
 protected:
   bool filterAcceptsRow (int sourceRow, const QModelIndex &sourceParent) const override;
 
 private:
+  void handleCallRunning (int index, CallModel *callModel);
+  void handleCallsAboutToBeRemoved (const QModelIndex &parent, int first, int last);
+
+  bool addToConference (const QString &sipAddress);
+  bool removeFromConference (const QString &sipAddress);
+
+  QStringList getInConference () {
+    return mInConference;
+  }
+
   QStringList mInConference;
+  QStringList mToAdd;
 };