I am gettting the below error, only for exchange in SCOM. Anyone having any idea why?

Failed to store data in the Data Warehouse. The operation will be retried.
Exception 'InvalidOperationException': The given value of type String from the data source cannot be converted to type nvarchar of the specified target column. 

One or more workflows were affected by this.  

Workflow name: Microsoft.Exchange.15.MailboxStatsSubscription.Rul

We are getting the exact same error. Its the only event that says something about failed to store data in the Data Warehouse. This event id (31551) repeats every 10 minutes.

Hi Sir,

Please refer to the article regarding the same error :

http://blogs.technet.com/b/silvana/archive/2014/04/11/exception-39-invalidoperationexception-39-the-given-value-of-type-string-from-the-data-source-cannot-be-converted-to-type-nvarchar-of-the-specified-target-column.aspx

Hope it is helpful to you .

Best Regards,

Elton Ji