Fix Outlook Security Certificate Error

Encountering an Outlook security certificate error can block your workflow, but this guide walks you through what causes them and how to resolve them step by step. You learn how incorrect SSL/TLS configuration, outdated certificates, or server mismatches contribute to the warning. The article also shows how importing a valid root certificate or adjusting security settings can fix connection problems. When certificate errors damage your PST file and prevent access, the MSOutlookHelp Outlook PST Repair Tool steps in. It recovers deleted or corrupted mailbox contents, supports encrypted files, and keeps the original structure intact. Moreover, its user interface is designed for simplicity, so even non-tech users can operate it.