Microsoft Transport Suite issues moving attachment more than 29MB in Exchange Server 2007/Windows Server 2008

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Hello folks,

If you are moving from Lotus Dominio to Exchange Server and you are having some issues to move attachments larger than 28/29MB and you are also running Exchange Server 2007 on top of a Windows Server 2008, this kb was made for you :)

The issue is caused because IIS 7 has a default limit of 30,000,000 bytes and to change the default behavior we need to add a line to the web.config file containing a key named MaxAllowedContentLength with a value that is higher than the attachment that you are going to move.

The process is explained in this following kb:

Anderson Patricio

Written by Anderson Patricio

Anderson Patricio

Anderson Patricio is a Canadian MVP in Cloud and Datacenter Management, and Office Server and Services, besides the Microsoft Award he also holds a Solutions Master (MCSM) in Exchange and several other certifications. Anderson has been contributing to the Microsoft Community with articles, tutorials, blog posts, twitter, forums and book reviews. He is a regular contributor here at,, and Anderson (Portuguese).