Error when adding large attachment in Outlook on the Web

Symptoms
Users who are connected to a mailbox by using Outlook on the Web (formally known as Outlook Web App or OWA) cannot add an attachment to an email message. Additionally, the users receive one of the following error messages:

The following files couldn't be attached: Filename. Please try again later.

The following files weren't attached because adding them would cause the message to exceed the maximum size limit of 10 MB: filename.
Cause
This issue occurs because the attachment exceeds the message size limit. The default maximum message size for an attachment is 10 megabytes (MB).
Resolution
To resolve this issue, follow these steps:
  1. Increase the maximum message size for the organization by using the Set-TransportConfig cmdlet.
  2. Increase the maximum message size for the Send connectors by using the Set-SendConnector cmdlet.
  3. Increase the maximum message size for the Receive connectors using the Set-ReceiveConnector cmdlet.
  4. Increase the following settings in the OWA Web.config file:
    • maxAllowedContentLength (value in bytes)
    • maxReceivedMessageSize (value in bytes)
    • maxStringContentLength (value in bytes)
    • maxRequestLength (value in kilobytes)
  5. Increase the following settings in the EWS web.config file:
    • maxAllowedContentLength (value in bytes)
    • maxReceivedMessageSize (value in bytes)
  6. Stop and then restart the MSExchangeOWAAppPool application pool.
  7. Stop and then restart the MSExchangeServicesAppPool application pool.
Note Steps 3-6 must be performed in both of the following locations:
  • The Client Access server on which the Web.config files are located in the following path:

    %ExchangeInstallPath%\FrontEnd\HttpProxy
  • The Mailbox server on which the Web.config files are located in the following path:

    %ExchangeInstallPath%\ClientAccess
More information
For more information about client-specific message size limits, see the following Microsoft Exchange website:


Propiedades

Id. de artículo: 2957856 - Última revisión: 10/01/2015 07:22:00 - Revisión: 8.0

Exchange Server 2016 Enterprise Edition, Exchange Server 2016 Standard Edition, Microsoft Exchange Server 2013 Enterprise, Microsoft Exchange Server 2013 Service Pack 1

  • kbsurveynew kbprb KB2957856
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