ASM signature check blocking ActiveSync Upload of large files

The ASM blocks file uploads of more than 10MB by default. You can either up the limit to the available Max size of 20MB under ASM Advanced Configuration or you have to bypass the ASM for uploads by using an iRule.

when HTTP_CLASS_SELECTED {
ASM::enable
 Disable ASM for specific method

   if { ([HTTP::method] eq "PUT")}{
      ASM::disable
    }
   if { ([HTTP::method] eq "POST")}{
      ASM::disable
   }
}