Integration between Appian & Salesforce

We want to do Integration between Appian & Salesforce such that data should get synchronize from Salesforce to Appian and vice-versa.We have requirement of getting Salesforce Object Schema created in Appian Cloud database including relationships.
We have tried Salesforce Connector in Appian but with this we can only fetch data from Salesforce into Appian Interface & can update/insert/delete Salesforce data from Appian Interface.We want that data to be stored into  Appian Cloud database.
Is there any functionality for doing this or we have to use Webservices

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