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SQL Server error cannot open database requested by the login

Lincoln Burrows ~ Modified: February 17th, 2016 ~ ~ 1 Minute Reading

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  • February 17, 2016 at 1:09 pm #1113 Score: 0
    Lincoln Burrows
    Moderator
    16 pts

    I am trying to connect to MS SQL Server database using SQL Authentication, but it fails with this error:

    Cannot open database “DatabaseName” requested by the login. The login failed.
    Login failed for user ‘NT AUTHORITY\NETWORK SERVICE’.

    February 23, 2016 at 12:41 pm #1157 Score: 0
    Stephen West
    Moderator
    4 pts

    If you are using Windows authentication, then
    Create a SQL Server log login for NT AUTHORITY\NETWORK SERVICE on your SQL Server
    or
    Change the connection string like this

    connectionString="Servere=.\SQLExpress;Database=IFItest;User ID=UserName;pwd=password"
     

    February 25, 2016 at 1:16 pm #1192 Score: 0
    Andrew Jackson
    Moderator
    1 pt

    This error generally happens when users configured an asp.net application to IIS, and IIS tries to gain access (login) with improper permission.

    To fix this error

    • Open SQL Server Management Studio >> Security >> Logins (right click on the user) >> Properties

    • On Login Properties window, click on User Mapping from the left pane.
    • Under Users Mapped to this login: select the database and from the lower screen (Database role membership for: Database) check db_owner role and click ok

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