[Outlook 2013] Apps for Office and Internet Explorer 11 (IE11)

Question

We have the following configuration:
Windows 7 Professional,
Internet Explorer 11,
Microsoft Office 2013 (32-bit),
Microsoft Exchange 2013 CU6,
Symantec Enterprise Vault 11.
Patch level Microsoft Until 03-oct-2014, so very very recent.
What is the problem, in Exchange its possible to use "Office Web Apps" for integration with OWA. This works very good and we dont have any problems with OWA and the Office Web Apps within OWA Enterprise client.
But, in Outlook 2013, almost every "App for Office" crashes with a popup from Internet Explorer 11. When we open the App, we get a loading.... and after a while A popup with the message "Internet Exporer stopped working".
This is with every App i tested. And it can be reproduced.
What we tried:
Proxy settings;
Re-install Office 2013;
Internet Zone settings;
Browser compatibility modus with zones;
Reset internet explorer settings;
Various reg-hacks for IE security;
GPO settings for untrusted locations of Office Web Apps.
And lucky? No.
So we went back to IE9, and it works like a charm. No problems at all. But Unfortunately, IE9 is not an option due to company apps written for IE10+.
But when it works outside Outlook 2013 in IE11, but not inside outlook with IE11, there must be a problem somewhere with Outlook 2013/IE 11 integration. And actually, the currents Apps we don't need in Outlook 2013 (until snd quarter 2015, then we need them).
So for this time we configured "Block Apps for Office" GPO setting and depoyed it. And... In Every Office components Apps are disabled, but NOT in Outlook. So the GPO is not working for Outlook.
How to solve?

Answer 1

Here the procesmon dump where IE actually crashes...
0 ntoskrnl.exe MmUnmapViewInSessionSpace + 0x7a0 0xfffff80002e3d140 C:\WINDOWS\system32\ntoskrnl.exe
1 ntoskrnl.exe RtlSetSaclSecurityDescriptor + 0x4e5 0xfffff80002cf339d C:\WINDOWS\system32\ntoskrnl.exe
2 ntoskrnl.exe SeQueryInformationToken + 0xc48 0xfffff80002d8d878 C:\WINDOWS\system32\ntoskrnl.exe
3 ntoskrnl.exe ObOpenObjectByName + 0x306 0xfffff80002d8ea96 C:\WINDOWS\system32\ntoskrnl.exe
4 ntoskrnl.exe ObGetObjectSecurity + 0x57c 0xfffff80002d6079c C:\WINDOWS\system32\ntoskrnl.exe
5 ntoskrnl.exe ObGetObjectSecurity + 0x2a4f 0xfffff80002d62c6f C:\WINDOWS\system32\ntoskrnl.exe
6 ntoskrnl.exe KeSynchronizeExecution + 0x3a23 0xfffff80002a90e53 C:\WINDOWS\system32\ntoskrnl.exe
7 ntdll.dll ZwOpenKeyEx + 0xa 0x7781220a C:\Windows\System32\ntdll.dll
8 kernel32.dll GetSystemTimeAsFileTime + 0x232 0x775b3632 C:\Windows\System32\kernel32.dll
9 kernel32.dll GetSystemTimeAsFileTime + 0x575 0x775b3975 C:\Windows\System32\kernel32.dll
10 kernel32.dll RegOpenKeyExW + 0x1d 0x775b3a3d C:\Windows\System32\kernel32.dll
11 advapi32.dll RegOpenKeyExW + 0x13 0x7fefe924e43 C:\Windows\System32\advapi32.dll
12 iertutil.dll Ordinal650 + 0x7e4 0x7fefda3b054 C:\Windows\System32\iertutil.dll
13 iertutil.dll Ordinal650 + 0x853 0x7fefda3b0c3 C:\Windows\System32\iertutil.dll
14 iertutil.dll Ordinal63 + 0x77c0 0x7fefda3a800 C:\Windows\System32\iertutil.dll
15 ieframe.dll Ordinal231 + 0xe4c7 0x7fee5753497 C:\Windows\System32\ieframe.dll
16 ieframe.dll Ordinal170 + 0x8124 0x7fee56e2dc8 C:\Windows\System32\ieframe.dll
17 ieframe.dll Ordinal170 + 0x80ab 0x7fee56e2d4f C:\Windows\System32\ieframe.dll
18 ieframe.dll Ordinal170 + 0x8053 0x7fee56e2cf7 C:\Windows\System32\ieframe.dll
19 ieframe.dll Ordinal218 + 0xd83 0x7fee57ccc83 C:\Windows\System32\ieframe.dll
20 ieframe.dll DllUnregisterServer + 0x1174 0x7fee56a23a4 C:\Windows\System32\ieframe.dll
21 user32.dll TranslateMessageEx + 0x2a1 0x776d9bd1 C:\Windows\System32\user32.dll
22 user32.dll TranslateMessage + 0x1ea 0x776d98da C:\Windows\System32\user32.dll
23 ieframe.dll DllUnregisterServer + 0x15b 0x7fee56a138b C:\Windows\System32\ieframe.dll
24 ieframe.dll Ordinal159 + 0xa522 0x7fee56d8cf2 C:\Windows\System32\ieframe.dll
25 ieframe.dll Ordinal159 + 0xaae6 0x7fee56d92b6 C:\Windows\System32\ieframe.dll
26 ieframe.dll Ordinal159 + 0xaa19 0x7fee56d91e9 C:\Windows\System32\ieframe.dll
27 kernel32.dll BaseThreadInitThunk + 0xd 0x775b59ed C:\Windows\System32\kernel32.dll
28 ntdll.dll RtlUserThreadStart + 0x21 0x777ec541 C:\Windows\System32\ntdll.dll