Office 365 Profile picture does not sync to Azure AD
Allow the Delve/Office 365 photo to be synced to ThumbnailPhoto attribute in Azure AD.
Kyle Dalfrey commented
We have on prem services that use the ThumbnailPhoto attribute. Users are accustomed to updating their photo via OWA. As such, whey they update their phone in Exchange Online, it does not get synced by to our on prem AD.