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[Solved] How to Enable Mixed Mode Authentication and System Administrator (sa) Login

Take the following steps to enable mixed mode authentication on the SQL Server:

  1. Open SQL Server Management Studio Express.
  2. Choose Windows Authentication from the Authentication drop down list.
  3. Click Connect to open the Microsoft SQL Server Management Studio Express window.
  4. Right-click the SQL instance and choose Properties to open Server Properties window.
  5. Click Security on the left hand side.
  6. Choose SQL Server and Windows Authentication Mode on the right side.
  7. Click OK to close the Server Properties window.
  8. Right-click the SQL instance and choose Restart.
  9. Click Yes to restart the SQL server.

Take the following steps to enable the System Administrator login:

  1. Open SQL Server Management Studio.
  2. Choose Windows Authentication from the Authentication drop down list.
  3. Click Connect to open the Microsoft SQL Server Management Studio window.
  4. Expand Security > Logins.
  5. Right-click sa and click Properties.
  6. Click Status and check the box for Login Enabled.

Note: You may have to give the system administrator account a password at this time as well.

Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

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