DLP Storage: Scan MS SQL database failed

Error as below:

Failed to read sqlserver://IP:1433/DLP_Poc;instance=hostname; error: Unable to create a database connection: Unable to create connection: jdbc:jtds:sqlserver://IP:1433/DLP_Poc;instance=hostname Reason: Login failed for user 'hostname\Administrator'..

What id/access do DLP actually need to scan a database?

We've tried to adjust the syntax @ credentials....but keep failed... hmm