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You try to connect Power BI to SQL Server but get an error 'Login failed for user'. What is the most likely cause?

medium📝 Formula Fix Q6 of 15
Power BI - Getting Data
You try to connect Power BI to SQL Server but get an error 'Login failed for user'. What is the most likely cause?
AThe table name is misspelled in Power BI
BPower BI Desktop is not installed
CSQL Server is not running on the machine
DIncorrect username or password in connection settings
Step-by-Step Solution
Solution:

  1. Step 1: Analyze the error message

    'Login failed for user' indicates authentication failure.

  2. Step 2: Identify common authentication issues

    Incorrect username or password is the most common cause of login failure.

  3. Final Answer:

    Incorrect username or password in connection settings -> Option D

  4. Quick Check:

    Login failure = Authentication error [OK]
Quick Trick: Check username and password carefully for login errors [OK]
Common Mistakes:
  • Ignoring authentication details
  • Assuming software installation causes login failure

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