Domain Name Character Length. For your additional question. The number of characters are counted for each domain name.
In my opinion domains with 3 or 4 words and more than 20 characters better be memorable and off the charts popular. You can modify the sAMAccountName attribute and assign a value up to 20 characters although I would retain the trailing. The number of two letter strings with two equal characters is just 26.
You can modify the sAMAccountName attribute and assign a value up to 20 characters although I would retain the trailing.
So to name your domain you can use any letter numbers between 0 and 9 and the symbol -. The number of characters are counted for each domain name. And containing 2 words. Its the number of octets.