Hi,since installing July KB Internet Explorer Mode (IE Mode) does no longer work.https://www.reddit.com/r/edge/comments/vy5ety/ie_retirement_emie_site_list_suddenly_not_working/ Can't really find any more information in the matter. Tried to uninstall the KB & tried the Known Issue Rollback, does not help. A site that normally opens in IE11-mode in Edge-chromium now only opens in Edge and does not work accordingly. https://support.microsoft.com/en-au/topic/july-12-2022-kb5015807-os-builds-19042-1826-19043-1826-and-19044-1826-8c8ea8fe-ec83-467d-86fb-a2f48a85eb41 /BR Mattias

VMStrengell I am fortunate not to have any intranet sites needing IE compatibility mode so can't confirm if there is a difference for intranet sites but for the 3rd Party ones I configured it in InTune. So I go Endpoint Security -> Attack Surface Reduction -> Edit my policy for "App and Browser Isolation" -> Neutral Resources -> add sites and IP's as needed. My devices normally take a couple of manual syncs or just leave them for a couple of hours for them to pickup the policy setting change. Sorry I can't be of more help.

MattiasB3 Yes, but you can check the help possibility that is in the shared article, as well as your post should change the location in the Edge Insider space."We have help along the way if you experience compatibility issues when testing your websites in IE mode. You can get no-cost remediation assistance for those issues from our App Assure compatibility experts by submitting a request for assistance or by emailing us at "`

Hi,was in contact with Microsoft, they have multiple cases of the same issue, patch breaking IE-mode. They're looking into it.

MattiasB3 Microsoft have come back to us and said they are looking into the cause for now they have provided a couple of possible work arounds I have used the NeutralResources via Intune Policies rather than GPO but the result should be the same. My users can now access the few URL's we need to work via IE computability mode. I dismissed the option of disabling Edge MDAG completely however we did test that on a test device and it also fixed the issue so seems to be something in the MDAG isolation policies causing the issue post patch.Add the sites in the IE Mode list as trusted in the Network Isolation policy. On the gpedit the path to the polices -> Computer Configuration\Administrative Templates\Network\Network Isolation.For intRAnet sites, you’ll need to add their IP addresses & the corresponding Network Domains to EnterpriseIPRanges (Network Isolation\Private network ranges for apps) & EnterpriseNetworkDomainNames (Intune only) policyFor intERnet sites, you’ll need to add their domains to either EnterpriseCloudResources (Network Isolation\Enterprise resource domains hosted in the cloud) or NeutralResources (Network Isolation\Domains categorized as both work and personal) policyOR Stop targeting Edge MDAG policies to those machines Hope this helps you.

Thanks EdwinLJ I can confirm the workaround of removal the MDAG policies fixed our issue. In our case the policies were not correctly implemented by a project and we were planning to remove them to start a fresh.

July 12, 2022—KB5015807 (OS Builds 19042.1826, 19043.1826, and 19044.1826)

Reza_Ameri
Silver Contributor
Jul 14, 2022
Have you tried updating the Microsoft Edge too?
Have you tried adding it to the list?
You may navigate to edge://settings/defaultBrowser and add it.
- MattiasB3
  Copper Contributor
  Jul 14, 2022
  Hi Reza,
  Version 103.0.1264.49 (Officiell version) (64 bitar)
  We're using the latest Stable channel version. I've also trided Canary which is on Version 105.0.1320.0 (Officiell version) canary (64 bitar).
  
  They are both showing the same symptoms.
  
  Yes, adding it to edge://settings/defaultBrowser just causes the page to not even open, it just ends up trying to load but nothing happens.
  
  /BR Mattias
  - Reza_Ameri
    Silver Contributor
    Jul 14, 2022
    Does it happen for other websites too?
    I advise you to visit the website and press Alt+Shift+I and report this issue.
Deleted
Jul 14, 2022
Hi MattiasB3
Please this is the official information provided by Microsoft, I hope it will be helpful:
Internet Explorer 11 has retired and is officially out of support—what you need to know | Windows Experience Blog
" Some websites only work with Internet Explorer—these websites might be built on older internet technology and not function properly while using a modern browser. Understanding this, we’ve built Microsoft Edge with IE mode. "
"
As a business, you can set up IE mode to use a site list, where you can catalog those sites that require Internet Explorer and have them load automatically in IE mode. You can store this site list locally, or in the cloud through the Microsoft 365 admin center, and any site on the list will load for your users in IE mode. This is the recommended approach if you’re a business that manages your devices and has legacy requirements.
"
- MattiasB3
  Copper Contributor
  Jul 15, 2022
  DeletedHi Andrzej1, if you read my first post, I'm stating that we're already using IE11 in Edge. This is however bricked since Julys' KB.
  - Deleted
    Jul 15, 2022
    MattiasB3
    Yes, but you can check the help possibility that is in the shared article, as well as your post should change the location in the Edge Insider space.
    "We have help along the way if you experience compatibility issues when testing your websites in IE mode. You can get no-cost remediation assistance for those issues from our App Assure compatibility experts by submitting a request for assistance or by emailing us at "
    `

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July 12, 2022—KB5015807 (OS Builds 19042.1826, 19043.1826, and 19044.1826)

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