1)

Click the app launcher

2)

We will need to perform the task shown in this help guide if the environment and domain configuration setting is disabled

3)

Click the gear cog 

4)

You need to add domain for the instance where you will be creating guides

Enter the domain in the format suggested

5)

Click on "Add Domain"

6)

To delete a domain, you need to click the dustbin icon

And then click "Apply"

7)

Note that you can not have duplicate domains added in an application or across applications

And when the environment and domain configuration option is enabled, MyGuide asks to add a domain on its own and we do not need to follow this manual process