CRM Dynamics - ExecuteMultipleRequest error

The request channel timed out while waiting for a reply after 00:01:59.8499880. Increase the timeout value passed to the call to Request or increase the SendTimeout value on the Binding. The time allotted to this operation may have been a portion of a longer timeout.

Set the time out for OrganizationServiceProxy . By default, the timeout is 2 minutes. i.e :

_yourOrganizationProxy.Timeout = new TimeSpan(0,10,0); // sets timeout for 10 minutes


To understand further about executing multiple requests from CRM SDK, check the following link :
https://msdn.microsoft.com/en-us/library/jj863631.aspx