Update tiktok.mdx

Author: muhsin-k

self-hosted/configuration/features/integrations/tiktok.mdx

@@ -20,9 +20,10 @@ Setting up the TikTok channel involves 7 steps.
 
 1. A self-hosted Chatwoot instance accessible via a public HTTPS URL
 2. A **TikTok Business Account** registered in an eligible region
-3. A **TikTok Developer Account** at [developers.tiktok.com](https://developers.tiktok.com)
-4. Access to the **TikTok Business Messaging API** (requires approval)
-5. Super Admin access to your Chatwoot instance
+3. Your TikTok Business Account must be set to **accept direct messages from everyone**. Otherwise, you will need to manually accept messages in the TikTok app. [Learn how to update your message settings](https://ads.tiktok.com/help/article/how-to-update-your-tiktok-direct-message-permission-for-tiktok-messaging-ads?lang=en).
+4. A **TikTok Developer Account** at [developers.tiktok.com](https://developers.tiktok.com)
+5. Access to the [TikTok Business Messaging API](https://business-api.tiktok.com/portal/docs?id=1832183871604753) (requires special permissions and approval)
+6. Super Admin access to your Chatwoot instance
 
 <Warning>
 The TikTok Business Messaging API is **region-restricted**. It is currently unavailable for accounts registered in the **European Economic Area (EEA), Switzerland, or the United Kingdom**. Personal TikTok accounts are not supported -only TikTok Business Accounts can use this integration.