# Advanced Functionality

- [Connection Override](/product-docs/chatbots/advanced-functionality/connection-override.md)
- [User Identity Verification](/product-docs/chatbots/advanced-functionality/user-identity-verification.md): Verify the identity of users
- [Announcements](/product-docs/chatbots/advanced-functionality/announcements.md)
- [Channel Specific Functionality](/product-docs/chatbots/advanced-functionality/channel-specific-functionality.md)
- [Zendesk Sunshine Conversations](/product-docs/chatbots/advanced-functionality/channel-specific-functionality/zendesk-sunshine-conversations.md)
- [How to handle image and file uploads in Zendesk Sunshine Conversations?](/product-docs/chatbots/advanced-functionality/channel-specific-functionality/zendesk-sunshine-conversations/how-to-handle-image-and-file-uploads-in-zendesk-sunshine-conversations.md)
- [Zendesk Chat (Classic)](/product-docs/chatbots/advanced-functionality/channel-specific-functionality/zendesk-chat-classic.md)
- [How to handoff conversations to Zendesk Chat (Classic) ?](/product-docs/chatbots/advanced-functionality/channel-specific-functionality/zendesk-chat-classic/how-to-handoff-conversations-to-zendesk-chat-classic.md)
- [Calendly](/product-docs/chatbots/advanced-functionality/channel-specific-functionality/calendly.md)