I don't believe this is possible using default Jira functionality. I know you can do this with the Automation for Jira add-on, though.
Basically, you would set a trigger for if an issue is moved to another project, then an action for sending an alert to a Slack channel using an incoming webhook in the Slack configuration.
Hey Atlassian community, I help lead engineering at Sentry, an open-source error-tracking and monitoring tool that integrates with Jira. We started using Jira Software Cloud internally last year, a...
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