chore(docs): Link to azure app setup from email channel (#484)

Co-authored-by: Pranav <pranav@chatwoot.com>

docs/product/channels/email/microsoft/create-channel.md

@@ -11,7 +11,7 @@ title: "Setup your Microsoft Email channel"
 
 ![list_of_channels](../images/list_of_channels.png)
 
-**Step 3**. Click on the "Microsoft" icon.
+**Step 3**. Click on the "Microsoft" icon. If the "Microsoft" option is missing in your Chatwoot installation, [set up a Microsoft Entra ID App](https://www.chatwoot.com/docs/self-hosted/configuration/features/email-channel/azure-app-setup).
 
 ![microsoft_channel](./images/microsoft-channel.png)
 
@@ -43,4 +43,4 @@ We are using default IMAP settings to fetch emails, and SMTP to send, you don't
 
 **Step 6**. If your access token get expired then you will need to re-authorize your microsoft account, which you can do via settings -> configuration page.
 
-![ms_reauthorization](./images/ms-reauthorization.png)
+![ms_reauthorization](./images/ms-reauthorization.png)