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The Logins tab shows a list of all the logins for a server with the following columns:

Name:  The name of the a Windows user, Windows group, or SQL user.

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Member Of:  A list of the roles the a user is a member of, separated by tabs, and line wrapping.. 

Connect Permission:  Shows connection permissions as Granted or Denied.

Login Status:  Shows a users login status as Enabled or Disabled.

SCREENSHOT

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The Roles tab shows all roles for the server with the following columns:

Name: The name of the role.

Members: A list of the logins which are members of this role, comma separated and word wrapping.

SCREENSHOT