To convert NSF (Lotus Notes) files to an Office 365 account, follow these steps:
Download a Conversion Tool: Obtain a reliable NSF to Office 365 migration tool such as VSPL NSF to Office 365 Migration Tool or any other reputable software.
Install and Launch: Install the chosen tool and open it on your system.
Add NSF Files: Click on the Add NSF File option and browse to locate the NSF files you want to convert.
Select Office 365 Account: Enter your Office 365 credentials to connect the tool to your Office 365 mailbox. The tool will usually require your email address and password.
Configure Migration Settings: Adjust any necessary settings, such as choosing specific folders to migrate or applying date filters.
https://www.vartikasoftware.com/product/vs-nsf-to-office365-converter.html