diff --git a/internal/frontend/qml/BridgeTest/UserControl.qml b/internal/frontend/qml/BridgeTest/UserControl.qml
index 01ccf259..7dd8dd24 100644
--- a/internal/frontend/qml/BridgeTest/UserControl.qml
+++ b/internal/frontend/qml/BridgeTest/UserControl.qml
@@ -26,6 +26,7 @@ ColumnLayout {
     id: root
 
     property var user
+    property var userIndex
     property var backend
 
     spacing : 5
@@ -250,7 +251,25 @@ ColumnLayout {
             id: loginFinishedIndex
             colorScheme: root.colorScheme
             label: "Index:"
-            text: "0"
+            text: root.userIndex
+        }
+    }
+
+    RowLayout {
+        Button {
+            colorScheme: root.colorScheme
+            text: "Already logged in"
+
+            onClicked: {
+                root.backend.loginAlreadyLoggedIn(0+loginAlreadyLoggedInIndex.text)
+                user.resetLoginRequests()
+            }
+        }
+        TextField {
+            id: loginAlreadyLoggedInIndex
+            colorScheme: root.colorScheme
+            label: "Index:"
+            text: root.userIndex
         }
     }
 
diff --git a/internal/frontend/qml/Bridge_test.qml b/internal/frontend/qml/Bridge_test.qml
index 7a59b1cb..7cbcca98 100644
--- a/internal/frontend/qml/Bridge_test.qml
+++ b/internal/frontend/qml/Bridge_test.qml
@@ -436,6 +436,7 @@ Window {
                     colorScheme: root.colorScheme
                     backend: root
                     user: ((root.usersTest.count > usersListView.currentIndex) && usersListView.currentIndex != -1) ? root.usersTest.get(usersListView.currentIndex) : undefined
+                    userIndex: usersListView.currentIndex - 1 // -1 because 0 index is fake user
                 }
             }
 
@@ -671,6 +672,7 @@ Window {
     signal login2PasswordError(string errorMsg)
     signal login2PasswordErrorAbort(string errorMsg)
     signal loginFinished(int index)
+    signal loginAlreadyLoggedIn(int index)
 
     signal internetOff()
     signal internetOn()
@@ -849,6 +851,9 @@ Window {
     onLoginFinished: {
         console.debug("<- loginFinished", index)
     }
+    onLoginAlreadyLoggedIn: {
+        console.debug("<- loginAlreadyLoggedIn", index)
+    }
 
     onInternetOff: {
         console.debug("<- internetOff")
diff --git a/internal/frontend/qml/ContentWrapper.qml b/internal/frontend/qml/ContentWrapper.qml
index 11c2444a..bad78a49 100644
--- a/internal/frontend/qml/ContentWrapper.qml
+++ b/internal/frontend/qml/ContentWrapper.qml
@@ -377,6 +377,7 @@ Item {
                     target: root.backend
 
                     onLoginFinished: rightContent.showAccount(index)
+                    onLoginAlreadyLoggedIn: rightContent.showAccount(index)
                 }
             }
         }
diff --git a/internal/frontend/qml/Notifications/Notifications.qml b/internal/frontend/qml/Notifications/Notifications.qml
index b58cb7d9..34205bd1 100644
--- a/internal/frontend/qml/Notifications/Notifications.qml
+++ b/internal/frontend/qml/Notifications/Notifications.qml
@@ -57,6 +57,7 @@ QtObject {
         root.updateIsLatestVersion,
         root.loginConnectionError,
         root.onlyPaidUsers,
+        root.alreadyLoggedIn,
         root.enableBeta,
         root.bugReportSendSuccess,
         root.bugReportSendError,
@@ -414,6 +415,29 @@ QtObject {
         ]
     }
 
+    property Notification alreadyLoggedIn: Notification {
+        text: qsTr("This account is already signed it.")
+        icon: "./icons/ic-exclamation-circle-filled.svg"
+        type: Notification.NotificationType.Info
+        group: Notifications.Group.Configuration
+
+        Connections {
+            target: root.backend
+            onLoginAlreadyLoggedIn: {
+                root.alreadyLoggedIn.active = true
+            }
+        }
+
+        action: [
+            Action {
+                text: qsTr("OK")
+                onTriggered: {
+                    root.alreadyLoggedIn.active = false
+                }
+            }
+        ]
+    }
+
     // Bug reports
     property Notification bugReportSendSuccess: Notification {
         text: qsTr("Thank you for the report. We'll get back to you as soon as we can.")
diff --git a/internal/frontend/qt/frontend_users.go b/internal/frontend/qt/frontend_users.go
index 73dd3e9c..ffd81ca1 100644
--- a/internal/frontend/qt/frontend_users.go
+++ b/internal/frontend/qt/frontend_users.go
@@ -15,6 +15,7 @@
 // You should have received a copy of the GNU General Public License
 // along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
 
+//go:build build_qt
 // +build build_qt
 
 package qt
@@ -145,6 +146,7 @@ func (f *FrontendQt) finishLogin() {
 	defer f.eventListener.Remove(events.UserChangeDone, done)
 
 	user, err := f.bridge.FinishLogin(f.authClient, f.auth, f.password)
+
 	if err != nil && err != users.ErrUserAlreadyConnected {
 		f.log.WithError(err).Errorf("Finish login failed")
 		f.qml.Login2PasswordErrorAbort(err.Error())
@@ -158,8 +160,12 @@ func (f *FrontendQt) finishLogin() {
 
 	index := f.qml.Users().indexByID(user.ID())
 	f.log.WithField("index", index).Debug("Login finished")
-
 	defer f.qml.LoginFinished(index)
+
+	if err == users.ErrUserAlreadyConnected {
+		f.log.WithError(err).Error("User already logged in")
+		f.qml.LoginAlreadyLoggedIn(index)
+	}
 }
 
 func (f *FrontendQt) waitForUserChangeDone(done <-chan string, userID string) {
diff --git a/internal/frontend/qt/qml_backend.go b/internal/frontend/qt/qml_backend.go
index 01bd5065..9bd44e89 100644
--- a/internal/frontend/qt/qml_backend.go
+++ b/internal/frontend/qt/qml_backend.go
@@ -65,6 +65,7 @@ type QMLBackend struct {
 	_ func(errorMsg string)           `signal:"login2PasswordError"`
 	_ func(errorMsg string)           `signal:"login2PasswordErrorAbort"`
 	_ func(index int)                 `signal:"loginFinished"`
+	_ func(index int)                 `signal:"loginAlreadyLoggedIn"`
 
 	_ func() `signal:"internetOff"`
 	_ func() `signal:"internetOn"`