As described by Microsoft, “The Remote Access Auto Connection Manager service maps and maintains network addresses to connection destinations. This allows a destination to be automatically dialed from a program or from the command prompt. A network address can be an Internet host name, an Internet Protocol (IP) address, or a NetBIOS server name.” Though this description doesn’t make it clear under which circumstances the service is required, it is set to manual by default, so it will only be called when required, and based on the number of Google hits surrounding startup issues, it may be required often for some users.