R Kelly: Yes, thank you for posting the info re: the dll file msidcrl30 (sure this is Windows 7 and you're post is Win8 related, but no one seems to want to take ownership of the tutorial on Win8 - for good reason - it's basically an orphaned product)
Regarding the invalid account issue, I'll take a guess that there are registry changes required to make the connection between calendar and WM. My Vista machine bit the dust a few months ago, so I don't have a reference to use for investigation (even I won't take ownership of WM on Win8).
I searched for non-MS alternatives. Seems as thogh Mozilla Thunderbird w/ Lightning add-on for Cal takes top honors. The only other decent option was Outlook and that is said with caveats - not useful on Win8 RT.
If you're looking for just calendering, Rainlendar
, is well regarded, although I'm not familiar with it. I you couple that with Live Essentials mail - you might have a workable messaging platform.
Note that I'm not using Win8. I haven't used calendering since Outlook 98 and use Live Essentials Mail client.
If you find the "missing link" that ties WM and Cal on Win8, please do post what you find.