I have an issue of our company site.
We have 3 isp link contact to fortigate 300 e to spart port using SDWAN, the firewall can ping the Internet, we make a policy allow LAN network to internet, everything is fine, clients can ping 22.214.171.124, and can reach the gatway but can not access to email Outlook and brosing the Internet.
I check the DNS Server it is big to gatway and internet, but in clients pc I make ipconfg/all
The DNS Take ipv6
With different DNS not AD,
How Can I solve this issue