For those searching for a reliable way to import PST Files to Shared Mailboxes, I recommend using MailConverterTools PST to Office 365 Converter Tool. The software lets you migrate PST files directly into Office 365 Shared Mailboxes. One of its best features is the ability to automatically detect and remove duplicate emails from your PST files. This keeps your migration clean and organized, helps save storage space, and improves efficiency by eliminating unnecessary data. Additionally, the software is compatible with both Windows and macOS versions.

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