In order to change these logos you must first have a custom domain (e.g. 'YourCompany.huddle.net') and be an admin of the account.
Clicking on your profile picture in the top right of Huddle will show a drop down menu:
If you can see 'Account settings', you are an admin of the account. The first page that you land on will show you an overview of the account including your domain.
To change the Logo on your account, please follow these steps:
1. Click on your picture on the top right hand side of any screen in Huddle and then go to Account Settings.
2. Click on the 'Customisation' tab and you will be able to see which logos you are able to replace.
3. Clicking on the choose file button will open up a file explorer where you can locate the logo that you wish to use.
4. Click update in order to save your changes.