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Is it possible to connect to the DAC using SSMS? If I understand correctly, it should be possible by using "admin:" prefix before the server name, but I receive the following message:

Dedicated administrator connections are not supported via SSMS as it establishes multiple connections by design. (Microsoft.SqlServer.Management.SqlStudio.Explorer)

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This?… – Phil May 16 '12 at 14:35
Or maybe this: "By default, the connection is only allowed from a client running on the server. Network connections are not permitted unless they are configured by using the sp_configure stored procedure with the remote admin connections option." – swasheck May 16 '12 at 14:36
up vote 8 down vote accepted

You cannot connect the object explorer with the DAC. You need to use a single query window, and you can right-click on it to Connect/Change Connection.

The nature of object explorer is that it uses multiple connections, which is not allowed with the DAC.

Another piece with the DAC, out of the box it only allows local connections (due to security reasons). If you want to be able to connect to the DAC remotely, you need to configure it accordingly:

exec sp_configure 'remote admin connections', 1
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Also, if you have level 20 notifications set up, you may want to disable IntelliSense in the query window before connecting. – Jon Seigel May 17 '12 at 1:15

This error occurs when you try to connect to DAC using the right click Connect and the Connect to Server dialog from the Object explorer

However, you can connect to DAC via SSMS by clicking the Database Engine Query button

enter image description here

The Connect To Database Engine dialog will pop out. Type the "admin:" prefix before the server name and you'll be connected to DAC

enter image description here

Hope this helps

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