Office 365 MFA being blocked
I've recently disabled the Outgoing policy and now our Office 365 MFA approval notifications are being blocked if the mobile devices with the Microsoft Authentication app is connected to the Wi-Fi. If the mobile devices is using the mobile data/4G network it works fine.
If I enable the Outgoing policy if works fine again, so it definitely something to do with the Outgoing policy that is blocking it, even though in traffic monitor I can see it being Allowed through the default HTTPS Proxy.
Does anybody know whats blocking this or what the recommended setting are?