Edge - IE mode issue

Phil Z 1

I have a two site, say site www.site1.com and www.site2.com.

the way how it works is.

I login into first site using my login username and password. After successful login, the site will open a list of links. On one of the links is the www.site2.com (legacy app). Clicking on this will open the second site in a new tab.

With the IE browser coming to an End soon. we are forced to use Edge and IE mode.

I have set www.site1.com to open in Edge mode and www.site2.com in Edge-IE mode. I have followed the instructions give in https://learn.microsoft.com/en-us/deployedge/edge-ie-mode-sitelist and tried https://learn.microsoft.com/en-us/deployedge/edge-ie-mode-add-guidance-cookieshare#how-cookie-sharing-works

It seems there is session is not shared between two mode.

below is my xml settings.

not sure if there is something I am missing here.

<site-list version="1">
<shared-cookie domain=".site1.com" name="cookie1"></shared-cookie>
<shared-cookie host=".site1.com" name="cookie2"></shared-cookie>
<site url="site1.com">
<open-in>None</open-in>
</site>
<site url="site2.com">
<open-in>IE11</open-in>
</site>
</site-list>
I also found out that it works when site1 and site2 are using both Edge mode or both as IE mode or both as IE11. But does not work using Edge mode and then IE mode.

I believe I missed something.

XuDong Peng-MSFT 10,341 Reputation points Microsoft Vendor

2021-08-31T03:36:55.137+00:00

Hi @Phil Z , According to your description, I think you may have some confusion about the share-cookie you mentioned. It is used to implement the sharing of Edge-IE-mode to IE browser, which is actually a share between the same browser( IE ). Rather than Edge to Edge-IE-mode, there are some differences ( Edge -> IE ). Hope you can understand. And I saw the same case on Stack Overflow, if they are all posted by you, I will continue to follow up your issue here.
Phil Z 1 Reputation point

2021-08-31T17:04:17.407+00:00

Thanks for the reply.

I did changed the above to

<site-list version="1">
<site url="site1.com">
<open-in>None</open-in>
</site>
<site url="site2.com">
<open-in>IE11</open-in>
</site>
</site-list>

But did not find any difference.

Please let me know.
Phil Z 1 Reputation point

2021-09-01T02:07:07.833+00:00

So it is not possible to share session between two tabs - one in Edge and another one in IE mode?
XuDong Peng-MSFT 10,341 Reputation points Microsoft Vendor

2021-09-01T08:47:52.713+00:00

Hi @Phil Z , I think this is not feasible, even the document mentions that share cookies can only be used from Edge-IE-mode to IE browser, sharing session cookies in reverse (from Internet Explorer to Edge-IE-mode) isn't possible.

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Edge - IE mode issue