Sign in or create a Microsoft Azure Account and this should take you to the Azure portal. You will need to click on 'Create a resource' and search for 'Text Analytics'.
You can then click 'create' in the bottom right corner.
You will need to set up a subscriptions if you haven't already. Once you set up an account, you can return to this stage and continue.
Once you have set up a subscription you will be able to create an application by filling out the following window. Hot 'Create once you are finished and this prompt azure to deploy this application (This may take a minute - you should see it in the top right of the web browser).
You can then click on the notification tab and Pin to Dashboard then go to resource.
Once you have done this you should see the screen below: (If you don't please refresh or sign in & out of cognitive services until you see the information you added above within the information ribbon below).
Click on keys, then copy and Paste them into the Cognitive Services Macro and select your field and type of text analysis.
Error: Invalid subscription key
This error tends to occur because the account hasn't fully been processed by Microsoft.
Solution: Please log in & out of Azure, verify the information looks correct and then copy and paste the key into Alteryx.