We upgraded Portal to 7.4 SP10 and as stated in note#2001910, UI5 apps are now working in IE11 and IE10 if we use the AFP standards framework page.
Following are still open on our side:
1. IE9 still has same issue even though the note states that it should work from IE9 onwards
2. "Full Screen" mode of the iView doesnt work correctly and re-size the app
3. Performance of UI5 app is comparatively slower than Chrome
4. Popup messages in our UI5 app are not shown correctly in IE11
More updates as we solve them.
Regards,
Parag.