You can't directly import OLM files into Outlook due to compatibility limits. A reliable solution is Stellar Converter for OLM, which converts OLM files into PST, MSG, and EML with 100% accuracy while preserving mailbox integrity. It supports Outlook 2021, 2019, and earlier, handles large OLM files, and also exports data to Microsoft 365, PDF, HTML, and RTF--ensuring smooth migration without issues.