From 2aa81d5c63a55dfeea0816cc59f9ee284ab48f70 Mon Sep 17 00:00:00 2001
From: Artem Nikitin <artemnikitin@artemnikitin.com>
Date: Fri, 11 Nov 2016 02:54:07 +0100
Subject: [PATCH] Add more details about ACM (#298)

* Add more details about ACM

* Fixes for #298
---
 README.md | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 690d7c5..db9ae2a 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ Table of Contents
 | [Device Farm](#device-farm) | [📗](#device-farm-basics) | [📘](#device-farm-tips) | [📙](#device-farm-gotchas-and-limitations) |
 | [IoT](#iot) | [📗](#iot-basics) | [📘](#iot-tips) | [📙](#iot-gotchas-and-limitations) |
 | [SES](#ses) | [📗](#ses-basics) | [📘](#ses-tips) | [📙](#ses-gotchas-and-limitations) |
-| [Certificate Manager](#certificate-manager) | [📗](#certificate-manager-basics) | | |
+| [Certificate Manager](#certificate-manager) | [📗](#certificate-manager-basics) | [📘](#certificate-manager-tips) | [📙](#certificate-manager-gotchas-and-limitations) |
 
 **Special Topics**
 
@@ -1582,9 +1582,17 @@ Certificate Manager
 
 ### Certificate Manager Alternatives and Lock-in
 
-- Certificates issued by the **Certificate Manager** can't be used outside of the services that support it. Imported certificates, however, can still be used elsewhere.
+- 		⛓Certificates issued by the Certificate Manager can't be used outside of the services that support it. Imported certificates, however, can still be used elsewhere.
 
-🚧 [*Please help expand this incomplete section.*](CONTRIBUTING.md)
+### Certificate Manager Tips    
+
+-       🔹**Supported services:** Elastic Load Balancer and CloudFront.  
+-		🔸During certificate validation process Certificate Manager will send an email to every contact address specified in WHOIS and up to five common administrative addresses. Some anti-spam filters can mark emails as spam because of this. You should check the spam folder of your email if you don't receive a confirmation email.
+
+### Certificate Manager Gotchas and Limitations    
+
+-       🔸In order to use **Certificate Manager** for CloudFront distributions certificate must be issued or imported from US East (N. Virginia) region. Certificates from other regions can be used for Elastic Load Balancer only. See [link](https://docs.aws.amazon.com/acm/latest/userguide/acm-services.html).        
+-       🔸**IoT** use their own process for work with certificates. Details described [here](http://docs.aws.amazon.com/iot/latest/developerguide/attach-cert-thing.html).    
 
 High Availability
 -----------------