RevocationCheckFailure is a Windows specific error during SSL import.
Official solution from Digicert (also valid for SECTIGO products!):
https://knowledge.digicert.com/solution/SO16481.html
Important: please make sure to also clear cache, otherwise it's not gonna work:
certutil -urlcache ocsp delete
certutil -urlcache crl delete
Exchange 2016 also has the same issue as Microsoft Exchange 2010, see:
and
https://www.exchangeitup.net/2016/08/exchange-20132016-using-exchange.html