I hate useless error messages.

Check in Event Viewer to see if it has any more information on it.
Yeah, the file explorer path is the correct location for the mapi inf.
From the looks of this from an office 2010 install, the file only holds addin info, not the other mapi services it used to hold. I hadn't realized that the connector was still installed - it hasn't worked with outlook.com in years - and when i removed that and restarted outlook, mapisvc.inf was updated - only BCM and iCloud remain in it.
Code:
[MAPI]
ServiceOrder=
[Services]
MSN_CON=Microsoft Outlook Hotmail Connector
IrisMS=Business Contact Manager Database
APLZODSERVICE=iCloud
[Default Services]
MSN_CON=Microsoft Outlook Hotmail Connector
[MSN_CON]
PR_SERVICE_DLL_NAME=MSNCON.DLL
PR_DISPLAY_NAME=Microsoft Outlook Hotmail Connector
PR_RESOURCE_FLAGS=SERVICE_PRIMARY_IDENTITY|SERVICE_NO_RESTART
PR_SERVICE_ENTRY_NAME=ServiceEntry
PR_SERVICE_DELETE_FILES=MSNCON.DLL
PR_SERVICE_SUPPORT_FILES=MSNCON.DLL
Providers=MSN_AB,MSN_MS,MSN_XP
[IrisMS]
PR_RESOURCE_FLAGS=SERVICE_SINGLE_COPY
Providers=Iris_MS
PR_SERVICE_DLL_NAME=BCMMS.DLL
PR_SERVICE_ENTRY_NAME=IrisServiceEntry
[APLZODSERVICE]
PR_SERVICE_DELETE_FILES=C:\PROGRA~2\COMMON~1\Apple\INTERN~1\APLZOD.dll
PR_SERVICE_DLL_NAME=C:\PROGRA~2\COMMON~1\Apple\INTERN~1\APLZOD.dll
PR_SERVICE_SUPPORT_FILES=C:\PROGRA~2\COMMON~1\Apple\INTERN~1\APLZOD.dll
PR_DISPLAY_NAME=iCloud
PR_RESOURCE_FLAGS=SERVICE_NO_PRIMARY_IDENTITY|SERVICE_SINGLE_COPY
PR_SERVICE_ENTRY_NAME=APLZODServiceEntry
Providers=APLZODMP
[MSN_AB]
PR_PROVIDER_DISPLAY=Microsoft Outlook Hotmail Connector
PR_RESOURCE_FLAGS=STATUS_PRIMARY_IDENTITY
PR_RESOURCE_TYPE=MAPI_AB_PROVIDER
PR_PROVIDER_DLL_NAME=MSNCON.DLL
[MSN_MS]
PR_PROVIDER_DLL_NAME=MSNCON.DLL
PR_RESOURCE_TYPE=MAPI_STORE_PROVIDER
PR_RESOURCE_FLAGS=STATUS_DEFAULT_STORE|STATUS_PRIMARY_IDENTITY|STATUS_PRIMARY_STORE
PR_PROVIDER_DISPLAY=Outlook Hotmail Connector Store Service
[MSN_XP]
PR_RESOURCE_FLAGS=STATUS_PRIMARY_IDENTITY
PR_RESOURCE_TYPE=MAPI_TRANSPORT_PROVIDER
PR_PROVIDER_DLL_NAME=MSNCON.DLL
PR_PROVIDER_DISPLAY=Outlook Hotmail Connector Transport Service
[Iris_MS]
PR_PROVIDER_DLL_NAME=BCMMS.DLL
PR_RESOURCE_TYPE=MAPI_STORE_PROVIDER
PR_RESOURCE_FLAGS=STATUS_NO_DEFAULT_STORE
PR_PROVIDER_DISPLAY=Business Contact Manager Database
PR_MDB_PROVIDER=4B4506EEF0B1A147AA0557297D0A084A
[APLZODMP]
PR_PROVIDER_DLL_NAME=C:\PROGRA~2\COMMON~1\Apple\INTERN~1\APLZOD.dll
PR_DISPLAY_NAME=iCloud
PR_PROVIDER_DISPLAY=iCloud
PR_RESOURCE_FLAGS=STATUS_DEFAULT_STORE
PR_RESOURCE_TYPE=MAPI_STORE_PROVIDER