Expose Branding - Enable Branding Automation via Powershell
Currently only Domain Admins can update the sign-in page illustration and must be done through the GUI.
I'd suggest exposing cmdlets through Powershell similar like "Set-UserPhoto" so this could be automated or scheduled.
It isn't optimal to manually update this regularly nor add a marketing/creative team member to have access to Azure AD to empower them to make these changes.
John Palmer commented
We are trying to manage our Office 365 tenant using DevOps. We need to set the values under "Manage custom themes for your organization" via the command line.
Thomas Stensitzki commented
This is a must have requirement.