No, it is not possible to import OLM files into iCloud Mail directly. iCloud Mail does not support the OLM file format, which is exclusively used by Outlook for Mac to store mailbox data. Due to this compatibility limitation, Apple Mail and iCloud cannot recognize or upload OLM files on their own. To move OLM data into iCloud Mail, the OLM file must first be converted into a supported format or migrated through an IMAP-based process. A professional solution like Aryson OLM file Converter is recommended for this purpose. It allows users to open OLM files, preview mailbox contents, and securely migrate emails to iCloud Mail while preserving folder hierarchy, metadata, and attachments. This approach ensures accurate and reliable data migration without data loss.