PKI and certificate manager has put gray hairs on the top of more than a few heads. A good number of the public cloud service disasters you hear about are likely due to certificate (mis)management issues. You want to make sure you have all your certificate related ducks in a row.
The Microsoft Azure Security team put together a great blog post on some of the key issues that you should address when working with certificates in Azure. The name of the article is "Certificate Management Do's and Dont's" and you can find it at: