We are currently working on automatically removing hidden/disabled users from the org chart.
837 votesAnonymous commented
Currently have an open case with support as we have found even the workaround below
'1) The user has an Exchange license/mailbox. In this case the picture can be set in Exchange. From there it will sync from Exchange Online to SharePoint Online. The user must navigate to their Delve Profile Page to trigger the sync from Exchange Online to SharePoint Online. This can only happen every 72 hours. '
No longer works either...reason not yet determined. Will update if we get a resolutions