1. A method of facilitating a hybrid application environment, the method comprising: in a first application server within a hosting environment, receiving a data request initiated by a hosted application hosted on the first application server within the hosting environment in response to a page request made on behalf of a hosted identity external to and logged into the hosting environment in order to gain access to the hosted application; in the first application server, generating a hybrid data request based on request information comprising at least a portion of the data request and the hosted identity; in the first application server, directing the hybrid data request over a connection established between the hosting environment and an enterprise environment for handling by a second application server within the enterprise environment; in the second application server, handling the hybrid data request using on-premises credentials; in the second application server, receiving a second data request initiated by an enterprise application within the enterprise environment in response to a second page request made on behalf of the enterprise identity logged into the enterprise environment; in the second application server, generating a second hybrid data request based on second request information comprising the second data request and the hosted identity associated with the enterprise identity; and in the second application server, directing the second hybrid data request over a connection established between the hosting environment and the enterprise environment for handling by the first application server within the hosting environment.