The users with administrative privileges can rebrand Zoho Assist by including their company logo, favicon and name, besides customizing the portal URL.
By making use of this feature you can:
Upload your company's logo
Upload your company's favicon
Change the company name
Configure the portal URL
Steps

Note:
Logo size should be 120x24 in pixels.
Favicon size should be 20x20 in pixels.
Supported file formats are jpg/gif/png/jpeg.
File size should be less than 500 KB.