I've been working on the topic of replacing SSL Certificates for VMware vCenter and VMware Update Manager Server (VUM) for quite some time now. Earlier in May 2010, I had the privilege to consult a large financial institution in London on VMware and Virtualisation. The consultancy engagement was for only one week and one of my assignments was to create and document a procedure for replacing their SSL certificates on all of their very many vCenter and VUM servers. Now, at first when asked to this piece of work, I asked myself the question: "Other than maybe improving security, why would you want to replace these SSL certificates anyway?" I mean, the standard once generated when you install the vCenter and VUM servers seem to be working fine. However, the more I started to dig into their environment, the more I realised just why they wanted to replace the SSL certificates on these servers. Let me explain:

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