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Dedicated Admin Console (DAC) a reserved connection on SQL Server that grants special access to system tables and can help diagnose problems
0
votes
"the maximum number of '1' dedicated administrator connections already exists" message in er...
Adding a System.Data.SqlClient.SqlConnectionStringBuilder object to your script, and using it to generate the connection string, would avoid this issue from the outset.
PS C:\> $SqlConnectionStringBui …
10
votes
Accepted
Static DAC ports for named instances
Taken from the Microsoft Support site:
To configure a static port for the specialized Dedicated Administrator Connection (DAC), you must update the registry key that corresponds to your instance. … I use this script to configure the Remote DAC port:
/*
Reads the instance's registry settings (via xp_instance_regread
as opposed to xp_regread), to determine if the Dedicated
Aministrator …