- Go to system info under SYSTEMs in Admin Console. You will find it under JIRA Info.
- Open your log files - every time it restarts, the log has the server id there as well.
- If you are the registered account at atlassian - check there as well, your account has the server id detail as per your license ( paid or evaluation)
There you go - THREE DIFFERENT PLACES where you can find the ID.
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