we have to offices and I will have to buy and configure two WG T35-W, one per office.
I will have to configure a VPN between them to connect both offices...
Is there a guide to help me on that VPN?
General documentation is here - which is searchable.https://www.watchguard.com/help/docs/help-center/en-US/Content/en-US/Fireware/_intro/fireware_help_front.html
There is a section on setting up Branch Office VPNs, which includes examples:https://www.watchguard.com/help/docs/help-center/en-US/Content/en-US/Fireware/other/chapters/manualbovpntunnels.html
thank you Bruce!