On a SQL 2012 Enterprise instance with the security model option set for SQL Authentication, creation of a "SQL Authenticated" user or changing the password of a user on this instance is no longer possible. My account belongs to a security group with sysadmin rights. Status of the broken account(s) [plural - also created a test account and it has the same issue] is grant and enabled. User has CONNECTSQL rights. Login is not locked out.
In attempting to login, after resetting the password to a known that has more than adequately met the minimum password requirements, and upon using the new or the login in question, with the known password, the error returned is "Login failed for user 'usernamegoeshere'"
A repair from the bootstrap was attempted "C:\Program Files\Microsoft SQL Server\110\Setup Bootstrap" and it ran with success.
Also attempted a GRANT CONNECT ON ENDPOINT::[TSQL Default TCP] to [public]
Effective rights are "CONNECTSQL"
Next attempt will be to rebuild the master but before going that far, it would be nice to have some feedback. I've never seen this before. Title contains error from the ERRORLOG.
R, J