**Can I connect more than one Brevo account?** Not in this version: each tenant has a single Brevo connection at a time (the "principal" one, Connections tab). **The key stopped working — what message will I see?** If the key is invalid or was revoked in Brevo, both when connecting and when testing the connection you'll see *"The token isn't valid; check it and try again"* (code `INTEGRATION_CREDENTIAL_INVALID`). Generate a new key in Brevo (section 3) and repeat section 4. **I activated "Event → transactional email" but no email arrives — why?** Check that you have a verified sender or an authenticated domain in your Brevo account (section 3): "successful connection" only confirms the key is valid, not that sending will work. **Brevo isn't responding — what message will I see?** If Brevo has a temporary incident, you'll see *"The provider isn't available right now. Try again later"* (code `INTEGRATION_PROVIDER_UNAVAILABLE`) — it's not a problem with your key, try again in a few minutes. **Can the agent delete contacts in Brevo?** No. The agent's tools (section 7) only search, look up and create/update — they never delete anything in your Brevo. **Can I launch marketing campaigns from the agent?** Not in this version: the integration covers transactional emails per event, never mass campaigns — those are still managed from Brevo's own panel.