diff --git a/addons/google_calendar/data/neutralize.sql b/addons/google_calendar/data/neutralize.sql
new file mode 100644
index 00000000000..3269127dfb6
--- /dev/null
+++ b/addons/google_calendar/data/neutralize.sql
@@ -0,0 +1,5 @@
+-- neutralization of Google calendar
+UPDATE google_calendar_credentials
+    SET calendar_rtoken = NULL,
+        calendar_token = NULL,
+        synchronization_stopped = True;
diff --git a/addons/microsoft_calendar/data/neutralize.sql b/addons/microsoft_calendar/data/neutralize.sql
new file mode 100644
index 00000000000..e05b7ebfac1
--- /dev/null
+++ b/addons/microsoft_calendar/data/neutralize.sql
@@ -0,0 +1,5 @@
+-- neutralization of Microsoft calendar
+UPDATE res_users
+    SET microsoft_calendar_token = NULL,
+        microsoft_calendar_rtoken = NULL,
+        microsoft_synchronization_stopped = True;