Quantify conformity or compliance between different datasets

Hello,
I have generated regression model using Azure design for a specific dataset of which I know the value to be predicted so I can evaluate the model performance and tune hyper-parameters. But now I would like to apply this trained model to a new and different dataset of which I do not know the values to be predicted during the regression so I cannot quantify the performance of the model for this testing dataset. However, for doing so I would like to see if the testing dataset is representative or similar to the trained dataset to evaluate if the prediction will be accurate. Is there a way in Azure to measure the conformity or compliance of a testing dataset to be similar or comparable to the training dataset?
Thank you!