The integration is going to access the SQL Management Studio through the SQL Server Authentication mode. Please check the settings of the server and confirm that the settings are correct. This is usually done by the IT guy or someone who has an admin access to the Admin Server.
To do this, please follow these steps:
1. Log in to the SQL Server Management Studio.
2. Right click on the server and go to Properties.
3. Go to Security and choose SQL Server and Windows Authentication mode. Click OK.
4. The changes will require to restart the services. Please refer to this article on how to do this: https://msdn.microsoft.com/en-us/library/hh403394.aspx