Hi Jamal,These 3 connections can all be used when you are accessing a local machine for your ArcSDE Workgroup/Personal geodatabases..\sqlexpresslocalhost\sqlexpresscomputername\sqlexpressAlternatively, you can also use the dynamic TCP/IP port number for the SQL Express instance, for example:computername,8774We would recommend to use the following format so that it's clear to which machine and which named instance you are going to connect.computername\sqlexpressThanks,Ben L.
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