I had someone ask me how to best update the AD RMS service account password. As we started mulling over it we realized that this is more than just a domain account that we change the password in the services mmc. Some of this information may be in the AD RMS configuration database, there is a web application pool account, and so on.
Poking around the AD RMS management console I found the “Change Service Account” wizard. Looking though this wizard it came across to me as what we use to change the account, but I wasn’t sure about updating the existing one.
Digging around my RMS lab and going through some resources I found the answer. The “Change Service Account” wizard is the answer. It updates all the needed items. I’ve written it up on the wiki so check it out!