How Can I convert Outlook 2010 to Lotus Notes?

You can use NST to PST to convert.

Convert Lotus Notes (.NSF) file data into Outlook (.PST) file formats, using this tool you can convert all record of NSF file data and save them Office 365,MSG, EML and PDF format. To know more- http://www.datarepairtools.com/nsf-t...converter.html

there are free migrations tools like NUpgrade.exe available in the lotus note, that will help to migrate.

Efficiently and instantly converts Outlook PST files into Lotus Notes NSF files, this tool makes conversion a lot easier. With this Outlook to Lotus Notes Converter utility, user can instantly transfer all the emails and mailbox items from user profiles in MS Outlook into user profiles of Lotus Notes.
More Info :- Outlook to Lotus Notes Converter

Convert Lotus Notes to Outlook with the help of MailsDaddy NSF to PST Converter tool and get an error-free and MS Outlook importable PST file without any altered mailbox data. The NSF Converter tool maintains the same folder, sub-folder hierarchy along with email properties like to, cc, bcc, subject, sender, receiver, header, footer, signature, attachments, etc. It preserves the inline images with the same integrity. To get more information about Lotus Notes to Outlook Migration, visit here: Convert Lotus Notes to Outlook

For the quick and secure migration of Notes database you can go with CubexSoft NSF to PST Converter software. The tool exports entire data together with encrypted NSF emails by decoding them via its inbuilt decryption technique. The major aspect is that all versions of IBM Notes and MS Outlook are supported by the tool to perform the conversion.

1. Download and run PST to NSF Converter Tool.
2. Now you select Outlook PST files by using Add File button.
3. Now, your selected Outlook PST file will be automatically scanned.
4. You can select and view Outlook email.
5. Now set your mail filter option.

Prepare for the migration:

Install and set up Lotus Notes on the destination system.
Ensure that both Outlook 2010 and Lotus Notes are properly configured and functioning.
Export data from Outlook 2010:

Open Outlook 2010 and go to the "File" tab.
Select "Options" and navigate to the "Advanced" section.
Under the "Export" category, choose "Export" or "Import and Export."
Select "Export to a file" and click "Next."
Choose "Comma Separated Values" or "Personal Folder File (.pst)" as the export format and click "Next."
Select the folders or data you want to export (e.g., emails, contacts, calendar events) and click "Next."
Specify the destination location and provide a name for the exported file.
Start the export process, and once completed, close Outlook.
Convert exported data for Lotus Notes:

Depending on the export format chosen in the previous step, you may need to convert the exported data to a compatible format for Lotus Notes.
If you exported to a PST file, you can use third-party tools or services that offer PST to NSF conversion. These tools can convert the PST file into an NSF (Lotus Notes database) format.
Import data into Lotus Notes:

Launch Lotus Notes and open the target database where you want to import the data (e.g., mail database, address book).
Go to the "File" menu and choose "Import."
Select the appropriate data type (e.g., contacts, messages, calendar) and click "Next."
Browse to locate the converted file (NSF or other supported format) from the previous step.
Specify the import options, such as how to handle duplicates or conflicts.
Start the import process, and once completed, you should see your Outlook data imported into Lotus Notes.
Verify the migration:

Take the time to review the imported data in Lotus Notes to ensure that everything has transferred correctly.
Verify that emails, contacts, calendar events, and other items are in the appropriate folders and retain their original attributes.

You can also use CubexSoft Outlook Converter Tool to convert Outlook PST file to Lotus Notes .nsf file format directly. It allows you to batch import Outlook PST file to NSF file format including all emails, contacts, calendars, etc. without Outlook. There is no file size limitation, one can export a large size of PST files into IBM Lotus Notes. This software also supports various file formats such as PDF, MBOX, EML, MSG, DOC, RTF, Office 365, Gmail, G Suite, Exchange Server, Thunderbird, etc. It was compatible with all the latest and below versions of MS Outlook, Windows OS, and Mac OS.