[Email Security] Add missing step

Author: Maddy-Cloudflare

src/content/docs/cloudflare-one/email-security/setup/post-delivery-deployment/api/office365-api.mdx

@@ -11,8 +11,7 @@ This guide will instruct you through setting up Microsoft Office 365 with Email
 
 ## Prerequisites
 
-* A [Cloudflare account](https://dash.cloudflare.com/sign-up).
-* A domain to protect.
+<Render file="email-security/onboarding-prerequisites" />
 
 ## Enable Email Security via the dashboard
 

src/content/docs/cloudflare-one/email-security/setup/post-delivery-deployment/bcc-journaling/bcc-setup/gmail-bcc-setup/enable-gmail-integration.mdx

@@ -5,6 +5,12 @@ sidebar:
   order: 2
 ---
 
+import { Render } from "~/components"
+
+## Prerequisites
+
+<Render file="email-security/onboarding-prerequisites" />
+
 To enable Gmail BCC integration:
 
 1. Log in to [Zero Trust](https://one.dash.cloudflare.com/).

src/content/docs/cloudflare-one/email-security/setup/post-delivery-deployment/bcc-journaling/journaling-setup/manual-add.mdx

@@ -4,7 +4,11 @@ sidebar:
   order: 3
 ---
 
-import { GlossaryTooltip } from "~/components"
+import { GlossaryTooltip, Render } from "~/components"
+
+## Prerequisites
+
+<Render file="email-security/onboarding-prerequisites" />
 
 To manually add domains:
 

src/content/docs/cloudflare-one/email-security/setup/pre-delivery-deployment/mx-inline-deployment-setup.mdx

@@ -5,6 +5,12 @@ sidebar:
   order: 3
 ---
 
+import { Render } from "~/components"
+
+## Prerequisites
+
+<Render file="email-security/onboarding-prerequisites" />
+
 To set up MX/Inline:
 
 1. Log in to [Zero Trust](https://one.dash.cloudflare.com/).

src/content/partials/cloudflare-one/email-security/onboarding-prerequisites.mdx

@@ -0,0 +1,8 @@
+---
+{}
+
+---
+
+- A [Cloudflare account](https://dash.cloudflare.com/sign-up)
+- A [Zero Trust organization](/cloudflare-one/setup/#create-a-zero-trust-organization)
+- A domain to protect