Summary

The msteams plugin does not support acknowledgment reactions (ack reactions) on inbound messages. Discord, Slack, and Telegram all support this via resolveAckReaction() from the plugin SDK, but the Teams plugin does not call it.

Context

• resolveAckReaction is exported from plugin-sdk/index.ts and used by Discord, Slack, and Telegram
• The Bot Framework SDK supports adding reactions to messages via TurnContext.sendActivity with MessageReaction type
• Teams supports emoji reactions natively (like, heart, laugh, surprised, sad, angry + custom)
• The messages.ackReaction and messages.ackReactionScope config keys exist but have no effect on Teams

Expected Behavior

When a message arrives on Teams, the bot should react with the configured ack emoji (or the agent's identity emoji) to acknowledge receipt, consistent with how Discord/Slack/Telegram behave.

Current Workaround

None. Teams users have no visual indicator that their message was received until the full response arrives.