When logged in as a domain user and using SQL Server Manager during the authentication to the database, entering the password is slow (one dot every couple of seconds) and at the end authentication fails. This results in not being able to use the tool as a domain user (need to login as local machine user) This is the only mention I have found about this: https://forums.aws.amazon.com/thread.jspa?messageID=624372
Using Windows Authentication to SQL server, provided the use has access, the authentication works. Though using SQL Server Authentication it seems to be failing. The Administrator account is still slow to type the password, but authentication works.
(In reply to Alessandro Briosi from comment #1) Sorry, let me rephrase: 1. Windows Authentication works provided the user has access. 2. SQL Server Authentication if logged in as a Domain User fails and password typing is slow 3. SQL Server Authentication if logged in as Administrator works, but password typing is slow