Multi-solution Conversations (MSC)

Updated: Dec 4, 2025 Feature Availability: Invite-only beta. Managed partners, reach out to your SPM for more details To qualify for Multi-Solution Conversations, your business must have a messaging limit of 2,000 or higher. If WABAs associated with your phone numbers have restrictions or bans, you cannot onboard to the MSC Closed Beta. Please clear these restrictions before attempting to onboard. Some features may not be available or work as expected. Beta terms apply.

Overview

Multi-Solution Conversations enables businesses to use multiple partners and solutions on the same phone number, enabling a seamless chat thread experience for their customers.

Key features

Simple end-business onboarding via Embedded Sign-up: Partners can onboard businesses easily through Embedded Signup. Payment and template isolation per partner: Each partner has their own WhatsApp Business Account, their own templates, and their own billing and metrics.

How Multi-Solution Conversations works

The chart above illustrates a new WABA shared with each integrated partner, and assets separated per WABA. The business shares all phone numbers associated with their WhatsApp Business Account (WABA) to a partner through the Embedded Signup flow. A new WABA is created and shared with the respective partner that the business onboards with. The partner now has messaging or calling access to the business phone numbers shared with them and can message or manage calls on behalf of the business.

Supported APIs and Usage

Businesses can use a single phone number across one or multiple partners across the following APIs and uses: Messaging via WhatsApp Cloud API Calling via WhatsApp Cloud API Click-to-WhatsApp Ads via Ads Manager Note: Direct developers using a partner for any of these use cases is supported with Multi-solution Conversations, except for MM Lite.

Limitations

MM Lite is not supported for MSC businesses. Any marketing_messages requests will either be routed via Cloud API or rejected if the product_policy filed is set to strict. MSC does not currently support: Conversation routing and management: currently, all parties the phone number is shared with receive incoming webhooks. Businesses must work with partners to manage response handling. Coexistence phone numbers Phone numbers using the Groups API WABA created through Embedded Signup which are used on Ads Manager for Marketing Messages Measurement Partner onboarding

General limitations

Only 5 partners or solutions can be enabled per each end-business WhatsApp Business Account (WABA). Only 1 partner can attach a catalog to the shared phone number(s) between partners. The business cannot share a phone number with the same partner more than once via different WABAs. For example, the business has a phone number linked to WABA 1 and then shares WABA 1 with Partner 1. If you have the same phone number linked to WABA 2, you cannot also share WABA 2 with Partner 1. If you try to share the phone number, you may receive an error.

How messaging, calling, and account management works when using MSC

Use the table below to understand how different features and APIs work when using MSC as a partner or business.

Onboarding

Value: Use an existing phone number across multiple partners and solutions.

Business Experience	Partner Experience
The business onboards an existing phone with more than one partner via Embedded Signup.	Partners are able to see the new WABA shared with them within Meta Business Suite settings.

Account management

Value: Account management as usual

Business Experience	Partner Experience
Able to perform account management operations via the usual pathways (WhatsApp Manager, API, etc) based on permissions granted.

API usage

Value: Enable messaging and calling functions across multiple partners on a single phone number

Feature	Business Experience	Partner Experience
Cloud API Messaging MM Lite (see limitations section above)	Not applicable	Send messages: All partners are able to send messages via API on the shared phone number(s). Receive messages: All partners will receive all incoming webhooks on the shared phone number(s).
Cloud API Calling	Not applicable	Partners onboarded to the Calling API are able to make business-initiated calls, and receive user-initiated calls. Learn more about the WhatsApp Business Calling API
Templates	Not applicable	Partners can create templates as usual by using the new WABA, either through the API or WhatsApp Manager. Learn how to create and manage message templates
Conversation Routing and Management	Currently, all parties the phone number is shared with receive incoming webhooks. Businesses must work with partners to manage response handling.	Currently, all parties the phone number is shared with receive incoming webhooks. Businesses must work with partners to manage response handling.

Billing

Value: Simplified, siloed billing ownership per WABA

Business Experience	Partner Experience
Businesses can add a payment method to any of the WABAs created and shared with partners.	Partners add their own payment methods to the WABA shared with them, the same as they do today. Each Partner is billed only for the messages sent through their app. Per-message pricing applies.

Asset management

Value: Simplified, siloed asset management per WABA

Feature	Business Experience	Partner Experience
Templates	The business can create and see templates on all WABAs shared with partners.	Partners can only create templates on the WABAs that are shared with them. Partners are not able to see other Partners’ templates
Phone numbers	Phone numbers are a shared resource. Whether the end business or partner adds the phone number, it will be visible to all in Whatsapp Manager. Any new phone numbers added to WABAs using MSC are shared with all partners with access to these MSC WABAs.

Offboarding

Value: The business has full control of what partners, assets, and accounts they retain.

Role/Asset	Business Experience	Partner Experience
WABA	The business can delete the WABA.	Partners cannot delete the WABA shared with them
Phone number	Both the business and partner can delete a phone number
Partner	The business can remove the partner.	Not applicable.

How violations and bans work with MSC

Phone Number Violations Phone number violations will ban all WABAs across all partners, associated with the phone number. Template Violations Template violations will only apply to the violating WABA. Business Portfolio Violations Any bans on the Business Portfolio will ban all WABAs associated with the phone number Decision appeals continue to function as they do today. Only available to businesses with a messaging limit of at least 1000 business-initiated conversations in a rolling 24 hour period. Once a business meets the eligibility requirements, the MSC flow for Embedded Signup is automatically displayed in the Embedded Signup (ES) flow ( v2 and above). Partners don’t need to configure anything in Embedded Signup for this to work. This means that when businesses sign-up to a partner through ES, they will automatically be shown the flow below and be given the choice to share their existing business phone numbers which will onboard the business and partner to MSC. ES has two experiences and a given business may see either one of these randomly. Both experiences are described below Once the business completes the Embedded Signup flow, the partner does not need to re-register with the business again. The Notes column calls out any MSC specific notes for each screen.

Screen	Notes
Authentication screen	No changes
Authorization screen	No changes
Business Asset Selection Screen	This is where you’re able to select a WhatsApp Business Account that is already shared with other partner(s)
Phone number addition screen	Select ‘Use a new or existing WhatsApp number’, then click on the dropdown ‘Add a new WhatsApp number’, then select existing WhatsApp Business Account you want to share with current partner
Permissions review screen	No changes
Success screen	No changes

Businesses onboard to MSC by using the Embedded Signup flow: Note: This screenshots may differ as we evolve the product. Use them only for illustration of the concept Step 1: Select the Business Portfolio

Step 2: Select Share existing WhatsApp phone numbers

Step 3: The business selects the WABA with the phone number(s) they would like to share. Note: These numbers are only selectable if they have not been shared already with this partner.

Step 4: Create a name for the new WhatsApp Business Account being created.

Step 5: Verify permission information.

Step 6: Verify signup information and finish.

Troubleshooting

The “Share existing WhatsApp phone numbers” option is greyed out This can happen for a couple of possible reasons The business has already has a solution with the partner they are trying to share the number with The business has exceed the 5 partner maximum for the number The phone number is not eligible to send 1k messages yet The phone number has not been registered What can I do if the business phone number goes offline? Rarely, a phone number can go offline. To solve this issue, try the following: Register the phone number again: The business should search each of their WABA activity logs to find which partner registered the phone number first. Then, that partner can register the phone number again. (Optional) Turn off 2-factor authentication (2FA): If the business cannot obtain which partner originally registered the phone number, they can shut off 2FA and have another partner register the number again. Learn how to disable 2FA on a phone number.

FAQ

How do I get support? For support concerning Multi-Solutions Conversations, choose the WABiz: Onboarding topic when opening a Direct Support ticket. How can I offboard from MSC? To offboard from MSC (Optional) Migrate templates: If there are newly created templates on an MSC-created WABA, please migrate them before offboarding. [Learn how to migrate templates here.] Submit a WhatsApp support ticket: Use the request type “Embedded Signup - MSC Offboarding” and include the WABA you would like to retain retained. Is MSC supported for Tech Providers, Tech Partners, and Multi-Partner Solutions? Yes. Will a partner be able to see how many partners a client is using and the specific services/capabilities each partner provides? No. Does every partner need to register a given business phone number to onboard it to MSC? No, only one partner needs to register it. Once the number has been registered, it is ready to be used with new partners without the need to re-register it. What happens if a business tries to onboard without having previously registered their phone number(s) In this case, an error will be displayed in the Embedded Signup UI prompting the business to register their number(s) If multiple partners respond to messages within the same conversation window, who will be charged? Pricing follows the per-message changes released on July 1, 2025. What happens if two partners send messages at the same time? Will I get billed twice? Pricing follows the per-message changes released on July 1, 2025. When will MSC become generally available? Mid-2026. Did you find this page helpful? Thumbs up icon

ON THIS PAGE Overview Key features How Multi-Solution Conversations works Supported APIs and Usage Limitations General limitations Phone number sharing limitations How messaging, calling, and account management works when using MSC Onboarding Account management API usage Billing Asset management Offboarding How violations and bans work with MSC Onboarding for MSC (Embedded Signup flow) Embedded Signup flow for businesses (experience 1) Embedded Signup flow for businesses (experience 2) Troubleshooting FAQ

Overview

Getting started

Business setup

Messages

Templates

Embedded signup

Flows

Calling

Groups

Payments

Catalogs

Marketing messages

Click to WhatsApp ads

Solution providers

API reference

Pricing

Policies

Other

Support

Multi solution conversations

Multi-solution Conversations (MSC)

Overview

Key features