Attachment size issue Exchange 2013

Mohammed Nadeem 151 Reputation points


We are not able to send attachment of 10 MB from mobile only in exchange 2013 environment and we are able to send email from OWA and outlook with attachment of 25 MB.

Please assist us how to resolve it.

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Kael Yao-MSFT 37,486 Reputation points Microsoft Vendor

    @Mohammed Nadeem

    Just in addition to Andy's answer,here are some detailed steps on how to do it:
    1.Locate %ExchangeInstallPath%FrontEnd\HttpProxy\Sync\web.config and %ExchangeInstallPath%ClientAccess\Sync\web.config
    Find the maxRequestLength in both web.config files and change the value to a larger one which you'd like to apply to the ActiveSync limit.
    By default it is 10240 KB(10 MB).

    2.Locate %ExchangeInstallPath%ClientAccess\Sync\web.config
    Find the MaxDocumentDataSize and also change its value.
    By default it is 10240000 bytes(10 MB).

    3.Restart IIS and see if the changes have taken effect.

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