If you are searching for the solutions to import MBOX to Outlook then you can go through this informative article that explains the step-by-step guide of the manual method.
Following are the stages to Convert MBOX to Outlook Manually:
Stage 1: Change IMAP Settings in Gmail
Stage 2: Configure Thunderbird Account With Gmail IMAP Account
Stage 3: Log in to Outlook Using Gmail IMAP Account
However, the manual methods are too lengthy to perform. In this respect, you can also opt for the advanced Cigati MBOX to PST Converter Tool. This software is secure and reliable and is capable of migrating your bulk MBOX files to your Outlook account. Apart from Outlook, you can also transfer your files to many other email clients such as Gmail, IMAP, Thunderbird, Hotmail, etc. TO analyze its functionality, try its free demo version.