Looking for logging into the Jira Double site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Jira Double site. After that you can login as usual with your login credentials.
https://community.atlassian.com/t5/Jira-Service-Desk-questions/Double-Login-for-Customer-Portal-for-JIRA-Service-Desk-Cloud/qaq-p/735770
https://community.atlassian.com/t5/Jira-questions/Can-t-be-logged-in-to-two-cloud-JIRA-accounts-at-the-same-time/qaq-p/601272
https://community.atlassian.com/t5/Questions/Handling-of-multiple-My-Atlassian-accounts/qaq-p/584190
https://confluence.atlassian.com/cloud/secure-your-account-with-two-step-verification-939505063.html
https://community.atlassian.com/t5/Questions/how-to-avoid-multiple-users-will-be-connected-with-a-single/qaq-p/437324
https://marketplace.atlassian.com/apps/1213472/secure-login-2fa-jira
https://community.atlassian.com/t5/Jira-questions/How-do-we-do-multiple-sorting-in-JIRA-issue-navigator/qaq-p/20367
https://community.atlassian.com/t5/Jira-questions/Does-Jira-no-longer-allow-multiple-users-with-same-email-address/qaq-p/238025
https://community.atlassian.com/t5/Jira-questions/How-to-disable-Jira-admin-login-verification-prompt/qaq-p/388126
https://duo.com/docs/jira
https://community.getstation.com/t/allow-multiple-accounts-for-apps-that-dont-handle-session-instance-isolation-whatsapp-twitter-telegram-jira-asana-trello-invision-messenger-atlassian-linkedin-onedrive-outlook-buffer-hotjar-aws-monday-airtable-paypal-zoho-etc/322
http://www.midori-global.com/products/better-excel-exporter-for-jira/documentation/user-export
https://roadmunk.com/jira-roadmap-integration