https://community.blueprism.com/t5/Product-Forum/Database-connection-issue/m-p/56513#M10682 Unable to determine whether database exists - A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - An existing connection was forcibly closed by the remote host.) BP is installed in windows server I have my personal system that is able to connect to the Database and one server machine  that is not. machine os : windows 2012 R2 This is kind of high priority task so the faster response will be appreciated Fri, 11 May 2018 14:11:00 GMT AmitPatnaik 2018-05-11T14:11:00Z https://community.blueprism.com/t5/Product-Forum/Database-connection-issue/m-p/56513#M10682 Unable to determine whether database exists - A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - An existing connection was forcibly closed by the remote host.) BP is installed in windows server I have my personal system that is able to connect to the Database and one server machine  that is not. machine os : windows 2012 R2 This is kind of high priority task so the faster response will be appreciated Fri, 11 May 2018 14:11:00 GMT https://community.blueprism.com/t5/Product-Forum/Database-connection-issue/m-p/56513#M10682 AmitPatnaik 2018-05-11T14:11:00Z https://community.blueprism.com/t5/Product-Forum/Database-connection-issue/m-p/56514#M10683 Sounds like the app server machine can't talk to the DB server, so probably network related - blocked ports, firewall etc. Fri, 11 May 2018 16:51:00 GMT https://community.blueprism.com/t5/Product-Forum/Database-connection-issue/m-p/56514#M10683 John__Carter 2018-05-11T16:51:00Z https://community.blueprism.com/t5/Product-Forum/Database-connection-issue/m-p/56515#M10684 That's not the case. We have separate DB for testing purpose that's getting connected but the main DB is not. I have confirmed that no firewall and port is blocked.   Fri, 11 May 2018 17:48:00 GMT https://community.blueprism.com/t5/Product-Forum/Database-connection-issue/m-p/56515#M10684 AmitPatnaik 2018-05-11T17:48:00Z https://community.blueprism.com/t5/Product-Forum/Database-connection-issue/m-p/56516#M10685 OK so the app server can reach the DB server, but the error says it can't find the DB. Sanity-check the DB name spelling being used? Confirm the authentication being used is valid for that DB? Mon, 14 May 2018 13:30:00 GMT https://community.blueprism.com/t5/Product-Forum/Database-connection-issue/m-p/56516#M10685 John__Carter 2018-05-14T13:30:00Z