In MS Exchange Server 2010, if you have Short Message Service (SMS) message that have empty To or from fields on the the device, when you try to synchronize the device with the mailbox, the following error is logged in the Application log on the Client Access Server :
Source: MSExchange Common
Message: Watson report about to be sent for process id: <var>Process ID</var>,
with parameters: E12, <var>Build Type</var>, <var>Version Number</var>, AirSync,
MSExchange ActiveSync, Microsoft.Exchange.AirSync.SchemaConverter
UnexpectedCondition:ArgumentNullException, 0, <var>Version Number</var>.
An ArgumentNullException exception is thrown and the sync fails because Exchange ActiveSync does not handle the empty To and Form correctly during the synchronization.
To fix this issue, you should install this update : 2803727