Importing PST to Outlook Web Access manually is a multi-step process that requires using the Outlook desktop application. First, you need to open Microsoft Outlook on your computer and navigate to File > Open & Export > Import/Export. Then, choose Import from another program or file, select Outlook Data File (.pst), and browse for the PST file you want to import. Once imported, the data will be available in Outlook, but it won't automatically sync with OWA. To access the imported emails in Outlook Web App, you need to configure your Outlook desktop with the same Exchange or Office 365 account, ensuring the data syncs with the cloud. This manual method has several challenges, including dependency on Outlook desktop, the risk of data corruption, and the complexity of syncing emails with OWA. 

To simplify the process, the Cigati PST Converter Tool offers an efficient alternative. This tool allows you to convert PST files into formats compatible with OWA, such as EML or Office 365, enabling direct import without requiring the Outlook desktop app. It also preserves email structure, attachments, and metadata, making the transition seamless and error-free. Using Cigati PST Converter ensures a hassle-free, quick, and secure PST import process to Outlook Web App.