Not connecting to shared review

Adobe Acrobat Pro X is no longer connecting to the shared review comments. Normally when I open a file it asked me to "Please click Connect to join the shared review of <FileName>"  and also list the review server.

Now it does not seem to and we have since reinstalled the product with the same result. 

Is there some setting I am missing? None of the files I used to be able to open are showing reviews.

We are working on OSX Yosemite.