Hi,
Thank you for posting in Microsoft Q&A forum.
1,Similar thread for your reference: Creating a .scr for Personalization?
You can use third party tool to create a .scr slideshow, then deploy it via Intune in step 2.
2,Please pay attention to the setting "Force specific screen saver" under Windows 10 and later platform\Templates\Administrative Template\User Configuration In Intune. It is suggested to save your photos in %Systemroot%\System32 directory (usually is C:\Windows\System32) and then type the name of the file that contains the screen saver. And this setting is available in User type, so please assign this configuration profile to a user group. As shown below:
Or Policy CSP: CPL_Personalization_SetScreenSaver
Also you can try this:
Intune_ScreenSaver
https://github.com/Dbester/Intune_ScreenSaver
Thanks for your time. Have a nice day!
Best regards,
Simon
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