About Exchange 2013 SP1 ActiveSync MaxDocumentDataSize

Question

Hello,
After installing Exchange 2013 SP1 Version ‎(Build 847.32)‎ on Exchange 2007 organization , the mobile devices (Android, IPad, IPhone, ...) can't receive and send attachments over 10 MB using ActiveSync. When use Exchange 2007 SP7 Server on same Active Directory, 
we can send and receive attachment on same mobile devices via ActiveSync. We can send and receive attachments over 10 MB via OWA. I checked following solution for this problem but it didn't worked. Also I can see the Sync folder doesn't exist under "%ExchangeInstallPath%\ClientAccess"
but the folder located under "%ExchangeInstallPath%\FrontEnd\HttpProxy\sync"
http://technet.microsoft.com/en-us/library/hh529949%28v=exchg.150%29.aspx
I added following line under <appSettings>
<add key="MaxDocumentDataSize" value="31457280" />
Also changed following defination  from 10 Mb to 30 Mb.
<httpRuntime maxRequestLength="30720" />
Does anyone know how to solve the problem on the Exchange 2013 SP1 ?
Regards
Seckin DEMIR

Answer 1

Hi 
By Default there should be a file under this location (%ExchangeInstallPath%ClientAccess\Sync\web.config) as per the article and its nothing to do with the fronted service sync folder 
When you configure redirection from a top-level directory, a web.config file may be created under <drive>\Program Files\Microsoft\Exchange Server\<version>\ClientAccess\oab
Please check this location if you could find a web.config file.If you find in this location then you can try altering the MaxDocumentDataSize values in this location and perform IIS reset and see it should work.
If at all you do not need web.config to be located in this location then you will need to remove the top level redirection 
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