diff --git a/tap-with-azure-ad.adoc b/tap-with-azure-ad.adoc
index dafa0f8..e4a7c34 100644
--- a/tap-with-azure-ad.adoc
+++ b/tap-with-azure-ad.adoc
@@ -1,3 +1,5 @@
 === tap-with-azure-ad.adoc
 - - -
 _2022-10-05 10:54_
+
+https://azure.microsoft.com/en-us/products/active-directory/#overview +