A user account somehow is deleted from Active Directory. Accounts can usually be recovered within the tombstoneLifecycle period (Default : 60days).
Launch Powershell with Administrative rights on the AD controller.
Import the Active Directory module
Import-Module ActiveDirectory
Search for and confirm the user account exists (example uses John Doe - change for the correct user).
# Option1 : Search by full Display Name
Get-ADObject -Filter {displayName -eq "John Doe"} -IncludeDeletedObjects
# Option2 : Search by SAM Account Name (login)
Get-ADObject -Filter {sAMAccountName -eq "j.doe"} -IncludeDeletedObjects
Once confirmed that the account is available for recovery, restore the account back in place (may require a specific location, defined by TargetPath)
# Option 1 : Search by full Display Name
Get-ADObject -Filter {displayName -eq "John Doe"} -IncludeDeletedObjects | Restore-AdObject
# If a specific LDAP path is required
Get-ADObject -Filter {displayName -eq "John Doe"} -IncludeDeletedObjects | Restore-AdObject -TargetPath "OU=SBSUsers,OU=Users,OU=MyBusiness,DC=kelvatek,DC=local"
# Option 2 : Search by SAM Account Name (login)
Get-ADObject -Filter {sAMAccountName -eq "j.doe"} -IncludeDeletedObjects | Restore-AdObject
# If a specific LDAP path is required
Get-ADObject -Filter {sAMAccountName -eq "j.doe"} -IncludeDeletedObjects | Restore-AdObject -TargetPath "OU=SBSUsers,OU=Users,OU=MyBusiness,DC=kelvatek,DC=local"