Instructions
Open your browser and go to AstroEmpires.com. Click on "Members Login," select your server and type your username and password. Click on the "Login" button.
Click on "Administration" and select "Guild."
Select your guild and click on "Tools." Activate the checkbox next to "Enable direct URL."
Click on "Save." The next page will contain the newly-generated URL for your guild. Note it and share it with your guildmates.