Error message “maximum Request Length Exceeded” while Lotus Notes to Outlook conversion

Barclay Tcareva

Updated On - October 17, 2022

Organizational level communication requires an email client and every other company today uses one. Lotus Notes and Microsoft Outlook are two prominent email clients which have maximum presence in the business world. Lotus Notes to Outlook and the message doesn’t get converted. This error message appears when you use Microsoft Transporter Suite to migrate from Notes to Outlook. Microsoft Transporter Suite is used to export mailboxes from Lotus Domino Server to Exchange Server. However, at times during migration, the error message displayed is:

However, Outlook is relatively new but gaining more eminent presence rapidly. Experiencing the various beneficial features of MS Outlook, majority of organizations have started to migrate from Lotus Notes to Outlook. Outlook interface is easier and flexible in terms of user. Its elaborate features and professional mechanics make Outlook a better platform to work with. However, this doesn’t make MS Outlook indifferent from other email clients.

Many issues occur while Lotus Notes to Outlook email migration. One common error that users come across while they convert Notes to Outlook is “Maximum request length exceeded”. This error message occurs when you try to move a message of over 4 MB size from

The message was migrated without the attachments. This error might be due to configuration limitations on the server.

Both these error messages appear due to the same reason. It occurs due to the default limit in ASP.NET i.e. 4 MB. This means that Web services does not migrate attachments that are larger than the default limit of 4 MB until or unless additional configurations are made.

In order to resolve this issue, you need to increase the input stream buffering threshold value. For this you will have to increase the execution time out episode too. By improving the input stream buffering threshold value, you can export emails of 4MB size or bigger size from Lotus Domino to Exchange Server. This requires a lot of technical expertise and precise execution of commands. Microsoft Transporter Suite converts Lotus Notes to Outlook but with so many complexities. Therefore, it is always advised to use Notes to Outlook tool for migration and overcome all limitations.

Recoveryfix for Lotus Notes to Outlook is a specially designed tool with added features. It quickly converts emails, contacts, journals, appointments, tasks, notes, attachments, images to .PST file. It converts Domino user mailboxes to new account in Exchange Server or as .PST file. The converted data can be viewed in Text or RTF format. It supports version 8.0, 7.0, and 6.0 of Lotus Notes and Lotus Domino Server. Along with, it supports MS Outlook 97 and above, and every version of MS Exchange Server. A free evaluation version is also available to test the product before purchase. However, it limits you to convert only one NSF file and save first ten items of every folder existing in the NSF file.