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Outlook Classic Locked Offline
I bought a new Lenovo laptop with Windows 11 in early 2024 . In April I bought MS Office 2021 Pro Plus (Product Key: M9PBR-NQFQY-BJXQP-TBQYJ-WB8M9) which has run perfectly, including on 28 July 2025...
Close Outlook, delete the offline files in the path %localappdata%\Microsoft\Outlook\.ost, hold down the Ctrl key when restarting and select online mode, then runoutlook.exe /resetnavpaneto reset the configuration.