Redmine
Team Business EnterpriseUsers with administrative privileges can find this integration below the list of personal alert integrations on the Alerts & Integrations tab of the Project Settings page.
1. Select the Redmine integration
Section titled “1. Select the Redmine integration”

2. Set the server & API key
Section titled “2. Set the server & API key”The server URL is the full URL of your server - including https://.
You can find your API key on your account page when logged into Redmine
3. Configure transitions (optional)
Section titled “3. Configure transitions (optional)”You can specify the ids of transitions to be run when issues are resolved and reopened.
4. Save
Section titled “4. Save”That’s it! You can test the integration by clicking “Test”. Otherwise, just save it and you’re ready to go.