From 007dd179baa9dae1f5d92a73f5ecc5a0d9d34746 Mon Sep 17 00:00:00 2001
From: Jens Schuppe <schuppe@systopia.de>
Date: Mon, 19 Aug 2019 10:30:39 +0200
Subject: [PATCH] Outline in the docs that XCM's option "Match contacts by
 contact ID" is required.

---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index 71143b8..aa169f9 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,11 @@ The extension is licensed under
 
 *This section is yet to be completed.*
 
+### Configure Extended Contact Matcher (XCM)
+
+Make sure you use an XCM profile with the option *Match contacts by contact ID*
+enabled.
+
 ### Configure CiviCRM
 
 - Go to the Administration console `/civicrm/admin`