User is authenticated but not connected

app/src/main/java/eu/faircode/email/FragmentOAuth.java

@@ -95,6 +95,7 @@ import java.util.Map;
 import java.util.Set;
 
 import javax.mail.AuthenticationFailedException;
+import javax.mail.MessagingException;
 import javax.net.ssl.HttpsURLConnection;
 
 public class FragmentOAuth extends FragmentBase {
@@ -1134,6 +1135,21 @@ public class FragmentOAuth extends FragmentBase {
                 else
                     tvOfficeAuthHint.setText(R.string.title_setup_office_auth);
                 tvOfficeAuthHint.setVisibility(View.VISIBLE);
+            } else if (ex instanceof MessagingException) {
+                boolean notconnected = false;
+                Throwable e = ex;
+                while (e != null) {
+                    String msg = e.getMessage();
+                    if (msg != null && msg.contains("User is authenticated but not connected")) {
+                        notconnected = true;
+                        break;
+                    }
+                    e = e.getCause();
+                }
+                if (notconnected) {
+                    tvOfficeAuthHint.setText(R.string.title_setup_office_not_connected);
+                    tvOfficeAuthHint.setVisibility(View.VISIBLE);
+                }
             }
         }
 

app/src/main/res/layout/fragment_oauth.xml

@@ -288,6 +288,7 @@
             android:text="@string/title_setup_office_auth"
             android:textAppearance="@style/TextAppearance.AppCompat.Medium"
             android:textColor="?android:attr/textColorPrimary"
+            android:textStyle="bold|italic"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/tvError" />
 

app/src/main/res/values/strings.xml

@@ -254,6 +254,11 @@
     <string name="title_setup_office_auth">The error \'AUTHENTICATE failed\' can be caused by IMAP/SMTP being disabled by the system administrator</string>
     <string name="title_setup_office_auth_5_7_3">Please try the \'Other provider\' quick setup wizard.</string>
     <string name="title_setup_office_auth_5_7_139">Please try the \'Outlook/Hotmail/Live\' quick setup wizard.</string>
+    <string name="title_setup_office_not_connected">
+        The error \'User is authenticated but not connected\' mostly means that IMAP is disabled.
+        In the case of a consumer Outlook account, please go to the Outlook website, tap on the settings wheel at the top right, select \'Mail\', select \'Forwarding and IMAP\', and in the section \'POP and IMAP\' enable \'Let devices and apps use IMAP\'.
+        In the case of a corporate, education, etc. account, please contact the system administrator of the e-mail server.
+    </string>
     <string name="title_setup_oauth_rationale">Authorize access to your %1$s account</string>
     <string name="title_setup_oauth_update">Authorize an existing account again (otherwise create a new account)</string>
     <string name="title_setup_oauth_updated">Account authorization was updated</string>