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How to convert Lotus Notes to Office 365 manually


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The manual Lotus Notes migration process has four steps:

NSF database files backup for Lotus Notes

Creation of new user mailboxes in Office 365

Configuration of IMAP connections (TCP/IP ports) for the user accounts

Synchronize emails from Lotus Notes to Office 365 via an IMAP connection


Begin the migration process by following the steps below:


Perform a Lotus Notes Backup

During migration, there are chances of things going wrong, so it makes sense to back up the data in your IBM Lotus Notes by backing up the NSF database files containing the information about users’ mailboxes. Backups are important because they provide a restore point (of sorts) that you can use if your migration process fails and the NSF files are corrupted.


Create Mailboxes for Users on Office 365

You need to create a new mailbox for each user account that you are planning to migrate from Lotus Notes to Office 365. For the ease of cross-verification, ensure that all the details are the same between the Office 365 user profile and their Lotus Notes email client profiles.


Enable the IMAP Ports for Users

The IBM Lotus Notes to Office 365 manual migration takes place through the IMAP protocol, so you need to enable the TCP/IP ports for all users whose mailboxes are to be migrated to Office 365. To do this, follow the steps given:


Navigate to the ‘Domino Administrator’ tab in your Lotus Notes

Click on the ‘Configuration’ tab in ‘Domino Administrator’

Choose the appropriate Server file (or document)

Go to ‘Ports’ tab, then ‘Internet Ports’ and then ‘Mail’

Change the ‘TCP/IP Port Value Status’ to ‘Enabled’ for the Mail (IMAP) settings (leave the default TCP/IP port number value to ‘143’ as that seems to correspond with the IBM Domino server)

Click ‘Save’ to apply the changes

Establish a Connection with the IMAP Connector

With the TCP/IP ports of users’ accounts enabled, it should now be easy to establish a connection through the IMAP connector present in the IBM Lotus Notes email client. You can now directly synchronize your Lotus Notes email data to Office 365 once the connection has been successfully established. Depending on the amount of data you are migrating, the process may take longer.

Once the process completes, your Office 365 migration process is complete. Learn more about different Office 365 migration in detail at


I hope this is helpful!


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  • 3 months later...
  • 11 months later...

To convert Lotus Notes to Office 365 manually you can follow any of the given methods - 

1. Convert NSF to Office 365 by using IMAP Connection.
2. Transfer NSF files to PST and then Export to Office 365.

These methods are free but takes lot of time and effort. Moreover, you cannot perform this procedure if you do not have technical expertise . So, in such cases users can take help from automated tools like DRS NSF to PST Converter. This is a smart tool specially designed to transfer NSF files into different other file formats and email clients. You can use this software very easily without any loss to your data.

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  • 4 weeks later...

Yes, the professional approach regarding this migration task is a better option to ensure high data integrity. Apart from this, it also provides some advanced features that facilitate to optimize the entire task. I have analyzed the performance of the Cigati NSF to PST Converter that not only converts the NSF files into PST however, it also facilitates to import NSF to Office 365, Gmail, Yahoo Mail, Thunderbird, and many other popular email clients. Apart from this, you can also convert the multiple NSF files into different file formats such as, EML, MSG, EMLX, PDF, PST, HTML, MHT, MBOX, etc. You can also analyze its performance by opting its free trial version. 

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If you want to migrate NSF to Office 365 format manually then you have to export NSF file in CSV file format then you can import it in MS Outlook. After that use PST file for Office 365. This process takes lots of time and you cannot migrate NSF file to Outlook with full information.

Therefore most of user, try professional application software . This GUI software helps technical and nontechnical user to migrate Lotus Notes mailbox to Outlook 365 format with all mail & attachments. User can install the solution on different Windows OS and open mailbox in O365 file format.

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  • 3 months later...

If you want to stress free migration from Lotus Notes to Office 365 you may find numerous migration assistant provider who can help you to migrate to office 365... Also, there are few manual methods which can help it to do it yourself. Check the below steps.


Step 1: Backup NSF Files – The first and foremost step is to create the backup of NSF files. As we know, the manual method is always full of risks. Hence, a backup of data is a must.

Step 2: Now, for each user who has an account in Lotus Notes, create new mailboxes in Office 365.

Step 3: Enable IMAP TCP/IP port
In the Lotus Notes application, open the Domino Administrator.
Move to the Configuration
Execute the IMAP service by opening the server document.
Follow Ports>Internet Ports>Mail
Then, From the Mail tab, enable the TCP/IP port value status.
By clicking the Save button, save the changes.

Step 4: Make synchronization with the IMAP Connector using this, Synchronize mailboxes between Lotus Notes & Microsoft Office 365


J Wick

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