To post to Twitter on your behalf when creating a Blog, Email Campaign, Article or Podcast, the first time you do this you will need to authenticate with Twitter first, then verify your authentication. 

To set up Twitter integration with your blog for the first time:

1. Upon selecting Yes to Post to Twitter for the first time, you will be presented with the following options, below:
   
2. Click on the Authenticate with Twitter link. This will open a popup window, which takes you to the Twitter environment where you can login and action the authentication
3. Login to Twitter when this window appears, then click on 'Accept App'. Once completed, the popup window will thank you for authenticating with Twitter
4. When back viewing your new blog post, click on Verify Twitter Authentication, you will notice the Twitter Post entry will appear. The Blog tool will use the Heading of your Blog, as the Tweet body, also it will append a shortened URL which will drive your Twitter followers back to your website