Organization chart missing

I want to remove an old on-premise Lync Server 2010 hybrid installation. I use this as an guide: https://blogs.technet.microsoft.com/fasttracktips/2017/06/27/decommissioning-skypelync-on-premises/

All users are moved from the on-premise server to O365

DNS records are moves from on-premise to O365

Tenant ShareSipAddressSpace is set to False (Set-CsTenantFederationConfiguration -SharedSipAddressSpace $False)

A test user is disabled on-premise (Disable-CsUser -id testuser@contoso.com)

But now mailto:testuser@contoso.com can’t see the organization chart in the Skype for Business client anymore

The client only shows the information: ‘We could not find any organizational chart’

Any ideas why this happens