Have instal this combination
Win 8, Office365 ,Nav 2009R2, OLHandler.dll
get error CL/A in OLHandler (not registrerad)
with communication with Outlook365
have test with NAV in same config in
Win 8, Office 2013 ,Nav 2009R2, OLHandler.dll
and
Win 7, Office 2013 ,Nav 2009R2, OLHandler.dll
In this config it works OK
witch OLHandler.dll are right for Office365