When you use Microsoft Transporter Suite for Lotus Domino to migrate messages to Exchange Server 2007, some messages may be migrated without attachments

Consider the following scenario. You use Microsoft Transporter Suite for Lotus Domino to migrate an e-mail message from Lotus Domino to Microsoft Exchange Server 2007. This e-mail message includes an attachment that is greater than 28 MB. In this scenario, you receive the following error message:

This problem occurs because Internet Information Services (IIS) version 7.0 includes a built-in security feature that limits the maximum amount of data in a request. By default, this limit is 30,000,000 bytes, or slightly less than 29 MB.

To resolve this problem, you must make a change in one of the Web.config files on the Exchange Server 2007 computer. To do this, follow these steps:

1. Open Windows Explorer.
2. Locate the following folder.
   Program Files\Microsoft\Exchange Server\ClientAccess\exchweb\ews
3. Use Notepad to open the Web.config file.
4. Locate the section that contains the following entries:
   <configuration>
   <runtime>
5. In this section, add the following entries between the <configuration> entry and the <runtime> entry:
   
   <system.webServer>
   <security>
   <requestFiltering>
   <requestLimits maxAllowedContentLength="xxxxxxxx" />
   </requestFiltering>
   </security>
   </system.webServer>
   
   The xxxxxxxx placeholder in the MaxAllowedContentLength property indicates, in bytes, the size of the attachment that you want to enable. For example, if you want to enable a size of 40 MB, you can use the following entry:
   <RequestLimits maxAllowedContentLength=�41943040�
6. In the Services snap-in, restart the World Wide Web Publishing Service.

The "executionTimeout" attribute

If you configure the MaxAllowedContentLength property to enable very large attachments, you may also have to configure the executionTimeout attribute. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

For more information about the executionTimeout attribute and the maxRequestLength attribute, visit the following Microsoft Developer Network Web site:For more information about the MaxAllowedContentLength property, visit the following Microsoft Developer Network Web site: