Quickest way to customise the Windows logon logo/image/icon is to drop the images in this hidden folder. Images are in bmp and png format.
C:\ProgramData\Microsoft\User Account Pictures
Note: There are some subtle differences between Windows Server 2012 R2 & Server 2019
- Windows Server 2019 (doesn’t apply to 2016) has a symbolic link as the folder is actually called “Default Account Pictures” which redirects to “User Account Pictures”
- Windows Server 2019 appears to have some additional images with different sizes to Server 2012 & 2016
- REMOVED user-200.png
Server 2012 R2
The icons can be set using “group policy preferences” and copying images over from a share.