1) Open CRM Deployment Manager.
2) At the left side find Deployment Administrators and select add New deployment administrator.
3) Select Object type as user ---> select your domain location and check for the user and click on ok.
4) After adding the user we need to add the user in SQL privilege user groups followed with below URL.
https://msdn.microsoft.com/en-us/library/gg197630(v=crm.6).aspx