How to Change the Service Account for Analysis Services

As part of a routine check, I found that one of our servers had an instance of Analysis Services (SSAS) running under a local service account. As many of our solution pull data from various sources, on other servers, there is almost always a need to do a double hop. To enable that, the service needs to run under a domain service account. This being a simple task and only a small part of the bigger Kerberos puzzle, I filed a ticket with our support, for them to change the service account to one already existing. The reply I got is the cause of this blog post. I needed to provide the individual steps for the change. A quick googlebing turned up rather empty on specific SSAS guides, to my surprise, so I decided to create on myself (I had to anyhow).