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KB-25000: Authentication failed due to different username in samaccountname

Authentication Service ,  

26 June,20 at 04:21 PM

Problem: AD user cannot authenticate successfully with a right username

Cause: samaccountname has a different username or username with different character case e.g (username = jon, sammaccountname = Jon)

Workaround

User-added image
  1. Go to ADUC
  2. Go to View and enable Advance Feature
  3. Search username and check its property
  4. Go to its Attribute Editor and check if samaccountname and userPrincipalName contains the right username
Or 

Using the following powershell command to find out the above information
  • Get-ADUser [username]-Properties *| select samaccountname,name,UserPrincipalName

 

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