--- title: From WhatsApp Business App to Cloud API (Coex) — All-in-One Setup Guide description: Coex --- Wie können wir dir weiterhelfen? [Zu Content springen](https://knowledge.slace.com/knowledge-base/from-whatsapp-business-app-to-cloud-api-coex-all-in-one-setup-guide#main-content) ![SLACE Logo](https://knowledge.slace.com/hs-fs/hubfs/SLACE%20Logo.png?width=185&height=64&name=SLACE%20Logo.png) - Home - Products - Pricing - Blog - Company Hauptnavigation öffnen Hauptnavigation schließen - Home - Products - Pricing - Blog - Company Wie können wir Ihnen weiterhelfen? - Es gibt keine Vorschläge, da das Suchfeld leer ist. 1. [SLACE Knowledge Base](https://knowledge.slace.com/knowledge-base?hsLang=de) 2. [Neu & Updates](https://knowledge.slace.com/knowledge-base/neu-updates?hsLang=de) 4\. März 2026 # From WhatsApp Business App to Cloud API (Coex) — All-in-One Setup Guide ## This guide explains how to connect an existing WhatsApp Business App number to WhatsApp Cloud API via Coexistence (Coex) using SLACE—so you can use the SLACE dashboard while still keeping the WhatsApp Business App on your phone. #### **What is Coexistence (Coex)? (and why it’s useful)** **Coexistence (Coex)** lets you use the **same WhatsApp Business number** in two places at the same time: - **WhatsApp Business App** on your phone (your normal app experience) - **WhatsApp Cloud API inside SLACE** (automation, integrations, team inbox, workflows, reporting) This gives you **the convenience of the phone app** plus **the power of Cloud API**—all without losing access to your number. **Official Meta guide:**[https://developers.facebook.com/docs/whatsapp/embedded-signup/custom-flows/onboarding-business-app-users](https://developers.facebook.com/docs/whatsapp/embedded-signup/custom-flows/onboarding-business-app-users?utm_source=chatgpt.com) --- #### **Before you start** ### **Coex must be enabled for you** Before onboarding, **contact SLACE** so we can activate **Coexistence onboarding** in your dashboard. Without this activation, the Coex option will not appear. --- #### **✅ Practical learnings** ### **1) Keep Coex active** Open your **WhatsApp Business App** at least once every **14 days**. If not, the Coex connection may expire and you may need to reconnect. ### **2) Avoid “one phone for everything”** - WhatsApp confirms you **cannot** use the same phone number in WhatsApp (Personal) and WhatsApp Business at the same time. - **Best practice:** - 1 phone = **WhatsApp Business (work)** - 1 phone = **WhatsApp Personal (private)** Especially on **iPhone**, because: - iCloud keeps **one backup per WhatsApp account** - Each new backup **overwrites** the previous one ### **3) Android quick note** Android can support both apps on one device, but during onboarding it’s common to accidentally scan the QR code with the **wrong app** (Personal WhatsApp instead of WhatsApp Business). ### **4) Profile updates must be done in the Business App** ### Your profile picture and business description must be changed by the customer directly in the WhatsApp Business App. --- #### **What you need before starting** - Access to your **SLACE dashboard** - Access to your **Meta Business Portfolio** (admin mandatory) - Access to the **phone number** (to receive SMS/call verification) - The **physical phone** with the **WhatsApp Business App** installed (you will approve steps inside the app) --- ### **5) Business verification for Coex is done inside the WhatsApp Business App (Meta Verified) — not like the standard WhatsApp Business API flow** Full reference (WhatsApp FAQ): [https://faq.whatsapp.com/3872729742954601/](https://faq.whatsapp.com/3872729742954601/) With Coexistence, business verification does **not** follow the usual WhatsApp Business API / Business Manager verification process you may know. Instead, verification is completed **directly inside the WhatsApp Business App** via **Meta Verified**. Important: **Meta Verified is subscription-based** — please factor in the **ongoing cost** if you plan to get verified and unlock the related benefits. ✅ Key WhatsApp benefit: Once verified, your **display name will be shown** (along with additional Meta Verified benefits). --- #### **How to onboard Coex in SLACE** - Log into your **SLACE dashboard** - Go to **Profile (top right) → Settings → Channels** - Click the **gray WhatsApp logo** to start the onboarding flow ![](https://knowledge.slace.com/hs-fs/hubfs/undefined-Feb-24-2026-09-44-48-1633-AM.png?width=670&height=236&name=undefined-Feb-24-2026-09-44-48-1633-AM.png) - Complete the **Meta Embedded Signup** steps ![](https://knowledge.slace.com/hs-fs/hubfs/undefined-Feb-24-2026-09-44-49-6281-AM.png?width=670&height=857&name=undefined-Feb-24-2026-09-44-49-6281-AM.png)![](https://knowledge.slace.com/hs-fs/hubfs/undefined-Feb-24-2026-09-44-48-5680-AM.png?width=670&height=799&name=undefined-Feb-24-2026-09-44-48-5680-AM.png)   - **Important:** Choose **“Onboard a WhatsApp Business App”** (Coex option) - A **QR code** will appear in your dashboard - On your phone: - Open the **WhatsApp Business App** - **Scan the QR code** - Approve all prompts in the app - This grants SLACE/Cloud API permission to connect your number ![](https://knowledge.slace.com/hs-fs/hubfs/undefined-Feb-24-2026-09-44-49-1352-AM.png?width=670&height=778&name=undefined-Feb-24-2026-09-44-49-1352-AM.png) - Back in the SLACE dashboard, enter your number and receive the **verification code** - Finish the final steps → connection complete ✅ ### **Result** Your WhatsApp number is now active **in the phone app** and **in SLACE (Cloud API)** at the same time. --- #### **Need help?** If you need support or are unsure about any step, reach out and we can schedule a **20-minute onboarding call** to assist you. - [Meta & Kontoeinrichtung](https://knowledge.slace.com/knowledge-base/meta-kontoeinrichtung?hsLang=de#main-content) - [Instagram Direct](https://knowledge.slace.com/knowledge-base/meta-kontoeinrichtung?hsLang=de#instagram-direct) - [Facebook Messenger](https://knowledge.slace.com/knowledge-base/meta-kontoeinrichtung?hsLang=de#facebook-messenger) - [WhatsApp Einrichtung & Onboarding](https://knowledge.slace.com/knowledge-base/whatsapp-einrichtung-onboarding?hsLang=de#main-content) - [Überblick & Einstieg](https://knowledge.slace.com/knowledge-base/whatsapp-einrichtung-onboarding?hsLang=de#%C3%BCberblick-einstieg) - [Meta & Business-Portfolio](https://knowledge.slace.com/knowledge-base/whatsapp-einrichtung-onboarding?hsLang=de#meta-business-portfolio) - [Nummern-Setup & Verifizierung](https://knowledge.slace.com/knowledge-base/whatsapp-einrichtung-onboarding?hsLang=de#nummern-setup-verifizierung) - [Go-live & Aktivierung](https://knowledge.slace.com/knowledge-base/whatsapp-einrichtung-onboarding?hsLang=de#go-live-aktivierung) - [Fehlerbehebung & FAQ](https://knowledge.slace.com/knowledge-base/fehlerbehebung-faq?hsLang=de) - [Neu & Updates](https://knowledge.slace.com/knowledge-base/neu-updates?hsLang=de) - Home - Products - Pricing - Blog - Company [![baner\_01-1](https://knowledge.slace.com/hs-fs/hubfs/baner_01-1.png?width=10103&height=894&name=baner_01-1.png "baner_01-1")](https://knowledge.slace.com/?hsLang=de)