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I am using Delphi 10.2 and I have been given a database to connect to and I have no control over its name. It is in the format xxxx.yyyy and when I create the connection definition, all is good and I can connect. I am specifying the database as xxxx.yyyy and setting the other various parameters appropriately (the same as I do for other databases). I can use the SQL tool in the connection editor to query the tables just fine. I create a simple TFDQuery consisting of a basic "select * from table" and when I attempt to run it, I am told that database xxxx is not in the list of valid servers and it should be added to sys.servers using sp_addlinkedserver. Clearly, what Firedac is passing to SQL server leads SQL server to interpret the xxxx as a server name. I have tried "select * from tablename", "select * from dbo.tablename", "select * from [xxxx.yyyy].tablename", "select * from [xxxx.yyyy].dbo.tablename" and other variations and still it refuses to work. I am setting no specific values for the components - I create the definition in the data explorer, test that it connects, test that I can use the "SQL script" tab to run various SQL statements. I then drag one of the tables onto the form designer (a quick test) and try to run the query and it fails with the message: "Could not find server 'xxxx' in sys.servers. Verify that the correct server name was specified. If necessary, execute the stored procedure sp_addlinked server to add the server to sys.servers". I have tried removing the database name from the connection definition, in the hope that the default database has been set - this does not work. Any suggestions, please? I am unable to request that the database name be changed.