Be sure to cap the amount of memory SQL can use on the server. If your server has 16GB of memory, you want to cap SQL at 14GB so that the OS has 2GB to use.
In my example, I have capped the SQL memory usage at 14GB
Install Full-Text and semantic Extractions
Make sure the SQL server is set to mixed mode authentication.
Give the domain service account that IIS is using SQL permissions. In my example, I'm using qa1 as the service account.
During the install, make the service account a sysadmin. When finished installing, you can demote it to DBcreator.
Under User Mapping make sure the service account is a user of master, model, msdb, and tempdb.
Make sure the TLS settings on the web server match the TLS settings on the SQL server. Version 6.3 and higher of the portal only requires TLS version 1.2 to be turned on.
Install SQL Server Management Studio. Note, you can install SSMS on the webserver so that you don't need to connect to the SQL server if any changes need to be done.