that's very strange. I've spend some more time into this issue.
If I test these two options with iphone and safari browser, all is working as expected. After this test, all other browsers also working, but without the go or proceed question. Tested with win 8 (firefox,ie, chrome), ios (safari) and android browser.
I've used the same profile for my tests. This must be a bug!
I've spent into this issue, a little bit more time. This Issue only occurs, if the proxy is working in transparent mode. In standard mode, all is working as expected. [:)]
Please, ignore my last post. The issue is very strange. This issue occurs only in a special constellation.
The constellation is following: - Proxy Profile is setting to standard or transparent mode - AD SSO is configured - Browser autoconfiguration (WPAD) is set in browser (provided by the UTM)
With manual proxy setting in the browser, all is working as expected. Without AD authentication and wpad setting, all is working as expected.