Attachment size issue Exchange 2013

Question

Hi

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.

Answer 1

See these articles on how to adjust this. Its set in a number of places for ActiveSync

https://learn.microsoft.com/en-us/exchange/architecture/client-access/client-message-size-limits?view=exchserver-2019

https://www.kuhnline.com/exchange-2013-email-size-limits-for-mobile-devices/#:~:text=Comments%20on%20ActiveSync%20limits,default%20value%20is%203000000%20bytes.

Answer 2

@Mohammed Nadeem
Hi,

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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