Changing the company logo on the AD FS sign-in page
Change company logo
To change the logo of the company that is displayed on the sign-in page, use the following PowerShell Windows PowerShell cmdlet and syntax.
Important
We recommend the dimensions for the logo to be 260x35 @ 96 dpi with a file size of no greater than 10 KB.
Set-AdfsWebTheme -TargetName default -Logo @{path="c:\Contoso\logo.png"}
Note
The TargetName parameter is required. The default theme that is released with AD FS is named default.