where i can get my server id

unknown

i have created free trail jira data center,i need license key,  i couldn't able to see license key, where i can find, in documents it shows can find in system info, but couldn't able to system info too

Jerrold - Empyra

Hi @[deleted]

You should be able to find the License information under the Applications tab from the administration 

To find the license key in Jira Data Center:

1. Log in as an admin.
2. Click the gear icon in the top-right corner.
3. Go to Applications.
4. Under the Applications section, Click on Versions & License where you can find your license key.

Thank you.