Is it possible to send Slack alerts for disconnected HubSpot email & calendar extensions?

This definitely sounds possible but there may a few different ways to tackle this. To set up an automation that sends a Slack message when someone in your organization has their HubSpot email and agenda extension disconnected, you might follow this suggested Zap workflow:

1. Trigger: Use HubSpot to monitor for changes in the status of the email and agenda extension (e.g., when it's disconnected). You might try using the “New Contact Property Change” if that does register those disconnections.
2. Filter: Add a filter step to make sure the Zap only continues if the status is set to "disconnected."
3. Action: Use Slack to send a message to the appropriate channel or person, notifying them about the disconnection with the 'New Message' action.

 
Note that this may require some experimentation and adjustment, but if you run into any roadblocks while setting this up, feel free to send me a link to your Zap in the editor, and I'll be happy to take a look and guide you on the next steps.