Vector graphics as custom branding
Azure Ad, Intune MDM and Company Portal are made to work on multiple devices, operating systems, resolutions and screen sizes. A single png as custom company branding is not. It looks bad (blurry, blocky, aliasing) when viewed on smaller devices, and if site scaling goes beyond 100% in the web browser.
Please add the ability to use vector graphichs (SVG) when setting custom branding.
Adam Coulter commented
The limitations on logo size would also be easier to stay within using SVG, as often a clean vector company logo rendered in transparent PNG increases the size significantly (beyond the limits).