Hello guys,
Since last week-end the application we are building was not working and all our calls to SuccessFactors oData API returned a 401 message with the description "Accessing OData API using Basic authentication or External OAuth on CF servers is forbidden.".
I saw in the release notes that https://salesdemo4.successfactors.com/odata/v2 should not be used anymore and all accesses to this api were blocked.
If you want to make it work again, you have to use the following URL: https://apisalesdemo4.successfactors.com/odata/v2 (I havent seen this URL before but I guessed it based on the documentation from SAP: )
If you are using the destination sap_hcmcloud_core_odata, I suggest that you change the hostname.
Hope it helps someone 
Cheers
Greg