If your organisation is using firewall or proxy settings, this could be blocking some verification services.
I would whitelist Atlassian's domains and IPs and see if this resolves the issue - see those on this page.
If you're still having issues - or if you're the main Admin and cannot access your site to see the user settings - I would suggest contacting https://support.atlassian.com/ for further assistance.
Hi Community! We're thrilled to share that Team Calendars for Confluence is now a built-in feature for Confluence Data Center releases 7.11 and beyond. A long time favorite, Team Cale...
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