Iphones not able to send attachments via Exchange activesync

So you've got an in-house Exchange 2010 environment, and you either support BYOB or your corp uses Iphones for it's employees.  You might run into an issue where your Iphone users cannot send attachments from their phones.  This problem and solution is explained here: http://social.technet.microsoft.com/Forums/exchange/en-US/52f58b47-b95e-4f44-bb4e-6bd8b1b4eb94/iphone-sending-attachment-problems
But the quick answer is that your 'uploadreadaheadsize' is set too low.  Remedy this by using the following command on your Exchange server:

C:\Windows\System32\inetsrv\appcmd.exe set config -section:system.webServer/serverRuntime /uploadReadAheadSize:"xxxxx" /commit:apphost

C:\Windows\System32\inetsrv\appcmd.exe set config "Default Web Site" -section:system.webServer/ServerRuntime /uploadReadAheadSize:"xxxxx" /commit:apphost

*xxxxx meaning the size in bytes that you want to allow


After you run those two restart IIS and you are good to go.  BTW the default size allowed is 48kb which is basically no attachment lol.