diff --git a/app/src/main/assets/linphonerc_default b/app/src/main/assets/linphonerc_default
index 736e7bd27..94743ebf3 100644
--- a/app/src/main/assets/linphonerc_default
+++ b/app/src/main/assets/linphonerc_default
@@ -49,6 +49,9 @@ fec_enabled=1
 [magic_search]
 return_empty_friends=1
 
+[chat]
+imdn_to_everybody_threshold=1
+
 [ui]
 contacts_filter=sip.linphone.org
 
diff --git a/app/src/main/java/org/linphone/core/CoreContext.kt b/app/src/main/java/org/linphone/core/CoreContext.kt
index 6c51d24b1..9d61d03cd 100644
--- a/app/src/main/java/org/linphone/core/CoreContext.kt
+++ b/app/src/main/java/org/linphone/core/CoreContext.kt
@@ -514,6 +514,9 @@ class CoreContext
                     core.logCollectionUploadServerUrl = "https://files.linphone.org/http-file-transfer-server/hft.php"
                 }
 
+                // Set IMDN threshold to 1
+                core.imdnToEverybodyThreshold = 1
+
                 Log.i("$TAG Removing previous grammar files (without .belr extension)")
                 corePreferences.clearPreviousGrammars()
             }