Please guide me the necessary steps and versions which i should follow to upgrade JIRA from 6.4.6 to 7.2.6. We also use JIRA Agile + JIRA service desk.
Possible, but you'd need to test it to be sure it works for you.
Start at https://confluence.atlassian.com/adminjiraserver071/upgrading-jira-applications-802592251.html
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