You are currently logged on with a user account that does not have sufficient privileges to change the service account. To ...

You are currently logged on with a user account that does not have sufficient privileges to change the service account. To change the service account, log on using an account that is a member of both the local Administrators group and the AD RMS Enterprise Administrators group. If the configuration database for this cluster is stored on a remote database server, the account must also have the appropriate permissions on the database server. For example, if you are using a SQL Server to support your AD RMS cluster, your account must belong to the SQL SysAdmin group.