I've noticed that while mapping Sharepoint with all needed configs enabled,
Some people still cannot map their Sharepoint drive,
If the Customer has Comcast, I normally disable IPv6 and enter a manual dns server of 8.8.8.8 with the secondary being what they obtain automatically,
Works like a charm, Google only has one IPv6 address according to nslookup, so when I ran a nslookup, it was running off the IPv6 DNS, instead of the IPv4
which digs up more than 12 addresses for google.com.