I have Java v7 and Jira v5.2, can I update Java to v8 ?
Jira 5 does not work on Java 8, so no.
But you can install multiple versions of Java on a server if you need to. Just make sure Jira still uses a supported version. (Or upgrade Jira of course - 5 is way out of support and has known security issues)
Thank you, I need to upgrade Java 8 because outlook will no longer support TLS below 1.2 and that is not supported in Jira 5.2 or am I wrong?
So is there any options other then upgrade Jira?
You can turn off TLS 1.2 and below in Java 7 (and enable it in 8 if you still have uses for it). Upgrading Java is not necessary to make Outlook work.
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