Microsoft KB Archive/925827

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You may receive an error message when you try to attach a large file to an e-mail message in Outlook Web Access in Exchange Server 2007

Article ID: 925827

Article Last Modified on 10/12/2007


  • Microsoft Exchange Server 2007 Standard Edition
  • Microsoft Exchange Server 2007 Enterprise Edition


In Microsoft Exchange Server 2007, when you try to attach a large file to an e-mail message in Microsoft Office Outlook Web Access, you may receive one of the following error messages.

Error message 1

The files: were not attached because they exceed the maximum size limitation SizeLimitation MB for attachments.

Error message 2

The attachment you are trying to upload exceeds the maximum size limit for attachments allowed by your organization.


This problem occurs if either of the following conditions is true:

  • You did not modify the MaxRequestLength attribute in the Web.config file on the Outlook Web Access server.
  • You did not modify the MaxSendSize attribute in the mailbox schema.

Note Regardless of the error message that you receive, you must modify both attributes to resolve the issue for Outlook Web Access clients.


To resolve this problem, visit the following Microsoft Web site:

How to Manage Maximum Message Size in Outlook Web Access

Additional query words: owa attachment

Keywords: kbtshoot kbexpertiseinter KB925827