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Application Links Documentation
Only application links to other Jira instances are relevant for the Federation for Jira app.
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However since you have not installed the Federation for Jira app on Jira 2 and Jira 3, you cannot use the /wiki/spaces/FED/pages/12386528 on a dashboard of those instances.
From the point of view of the Federation for Jira app, Jira 1 is your local Jira instance, while Jira 2 and Jira 3 are remote Jira instances.