Allow sites to be reloaded in Internet Explorer mode Greyed Out

[Springer84]

We have installed Edge 85.0.564.44 (Official build) (64-bit) and are attempting to do testing with IE Compatibility mode. The option appears, but is greyed out. I have also got Dev and Canary installed, the option is greyed out there as well. 

[#2]

@Stipe06 

You're welcome, great that it works for you now!

[#3]

nice very very nice

[#4]

@Neon01 

nightmare, after reboot computer impossible to run compatibility ...

EDIT: 

It's crazy, now with the configuration below:
---
<site url="___">
<compat-mode>IE8Enterprise</compat-mode>
<open-in app="true" allow-redirect="false">IE11</open-in>
</site>

---

When I put the URL address in the Edge browser it launches it on Internet Explorer ...

I do not understand anything anymore!

[#5]

@Neon01 Hi,

Maybe this details could help me with my issue?

[#6]

@Stipe06 

Sorry, my mistake, just tested it.

If you delete the "app" and "allow-redirect" options from <open-in> and then go to edge://compat/enterprise and click on "Force update" it should work.

...

<site url="___">
<compat-mode>IE8Enterprise</compat-mode>
<open-in>IE11</open-in>
</site>

...

[#7]

@Neon01 

It's resolved, I was missing this parameter:

Thanks to you.

But I did not found in the ADMX, I had to manually create the regedit key...

You are the best, thanks!

[#8]

works i thank you there was no edge key create it and the dword value data is 1

[#9]

I still do not have The Microroft Edge on my PC.

[#10]

instead of <open-in>IE11</open-in> we tried <open-in allow-redirect="true">IE11</open-in>and it worked