I received an e-mail from Azure Team a few days ago stating:
Our records indicate that your subscription includes an Azure Access Control Service (ACS) 2.0 Namespace.
We are writing to inform you that certificates or keys related to your namespace(s) are about to expire between July 15, 2014 – November 15, 2014. Please find below the namespace(s) for which certificates and keys need to be updated. xxxACS, dev-sb, live-sb, uat-sb
I followed the instructions and when trying to check the status of these certificates inside the ACS Management Portal I get:
Service Namespace certificates and keys are automatically managed for this namespace
I found an old thread on MSDN here which states this email is due to an error and should be ignored, but as it regards a live environment I would like a confirmation on this.