I've tried to find some documentation on this but I can't seem to get anywhere
We have SQL 2008 installed on our SQL Servers, when we install, we always specify a domain account to run the SQL Services.
I've installed 2008 R2 on a test machine and I chose again to use a domain account to run the SQL Services, I noticed that the installation has created that domain account as a login in my instance. So the domain account that runs my SQL Services is now also a Windows Authenticated Login on my instance.
Is this normal for R2?