This is a issue with the truststore between the instances. You'll need to import the certificates for JIRA and Confluence into the truststore, as instructed on the following article: https://confluence.atlassian.com/display/KB/Unable+to+Connect+to+SSL+Services+due+to+PKIX+Path+Building+Failed
Hi Community! I’m Elaine, Confluence Product Manager. You may have read my earlier post about page tree in space navigation sidebar. I'm excited to share another improvement that helps you organize ...
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