diff --git a/src/sync_api.c b/src/sync_api.c
index 2ca24c91..f03b2c25 100644
--- a/src/sync_api.c
+++ b/src/sync_api.c
@@ -378,3 +378,25 @@ DYNAMIC_API PEP_STATUS disable_identity_for_sync(PEP_SESSION session,
     status = key_reset_identity(session, ident, NULL);
     return status;
 }
+
+DYNAMIC_API PEP_STATUS disable_all_sync_channels(PEP_SESSION session)
+{
+    assert(session);
+    if (!session)
+        return PEP_ILLEGAL_VALUE;
+
+    identity_list *own_identities = NULL;
+    PEP_STATUS status = own_identities_retrieve(session, &own_identities);
+    if (status)
+        return status;
+
+    for (identity_list *oi = own_identities; oi && oi->ident; oi = oi->next) {
+        status = set_identity_flags(session, oi->ident, PEP_idf_not_for_sync);
+        if (status)
+            break;
+    }
+
+    free_identity_list(own_identities);
+    return status;
+}
+
diff --git a/src/sync_api.h b/src/sync_api.h
index eaa34d3c..52f98b8a 100644
--- a/src/sync_api.h
+++ b/src/sync_api.h
@@ -306,6 +306,19 @@ DYNAMIC_API PEP_STATUS disable_identity_for_sync(PEP_SESSION session,
         pEp_identity *ident);
 
 
+/**
+ *  <!--       disable_all_sync_channels()       -->
+ *  
+ *  @brief Disable sync for all identities; use this function to reset
+ *         the state which identities will be synced and which not
+ *         This function is intended to be used at app init
+ *  
+ *  
+ */
+
+DYNAMIC_API PEP_STATUS disable_all_sync_channels(PEP_SESSION session);
+
+
 #ifdef __cplusplus
 }
 #endif