It seems like a simple update to switch from Outlook for Mac to Outlook for Windows. After all, both applications belong to the same Microsoft ecosystem, so most users anticipate their emails migrating smoothly.

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When users need to transfer their emails to email programs that support the MBOX format, managing Outlook PST files can become difficult. Many popular email clients, such as Mozilla Thunderbird, Apple Mail, Eudora, SeaMonkey and Entourage, use MBOX files to store mailbox data.