Marriott and Lufthansa launched a Preferred Partnership in September (read more here) that allows Bonvoy & Miles&More members to link their accounts (read more about my account linking experience here).

When I wrote about my experience of getting the first stay from this partnership posted to Miles&More (read more here) there were few comments from readers that reported that there was an issue getting the second stay posted, and this truly appears to be the case.
A great solo travel tip spotted this week on LoyaltyLobby.