HTB Academy Cracking Passwords with Hashcat: Skills Assessment

Hi everyone,
have anyone cracked down 100% of DC01.inlanefreight.local.ntds hashes?
So far I managed to Recovered…: 731/895 (81.68%) Digests
and the page says, it is possible to crack all hashes.
I tried different rules, wordlists, using crunch, masks, but I
am stuck and can’t progress further.
Any hint or clue what I am missing to use?