Connecting Onpremise CRM with Data migration tool.

Hi Folks,

Iam stuck connecting my on-premise 2016 crm to 2016 data migration tool, with below error.

Source  : Not Provided
Method  : Not Provided
Date    : 6/2/2016
Time    : 11:58:01
Error   : You don't have permission to access any of the organizations on the Microsoft Dynamics CRM server that you specified. Check with your CRM administrator.
Parameter name: dev-crm.test.com
Stack Trace : Not Provided

Any help, will be much appreciated.