The overall analysis of the good there is a train of thought. Our goal is to complete a link to the remote server.
First: We want to know where this server is (that is, to know its IP address, if it is in the same network to know its computer name is also possible, because a server can install multiple instances of SQL Server, if we want to connect to a non-default instance when we want to specify the instance name)
Second: We want to log on to the target SQL Server server with that username.
Third: We are locally logged in with which user.
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The first step:
Step Two:
Specify where the server is,
Step Three:
Specify Login Name
Fourth Step:
Complete.
To add a linked server to SQL Server