Complete the following steps to enable Internet Explorer integration on Microsoft Edge using Group Policy
Download the policy file from Microsoft Edge Policy Template.
Extract the downloaded Policy File folder MicrosoftEdgePolicyTemplates.
Copy msedge.admx, msedgeupdate.admx and msedgewebview2.admx file from C:\Users\{user}\Downloads\MicrosoftEdgePolicyTemplates\windows\admx to C:\Windows\PolicyDefinitions.
Copy msedge.adml, msedgeupdate.adml and msedgewebview2.adml file from C:\Users\{user}\Downloads\MicrosoftEdgePolicyTemplates\windows\admx\en-US to C:\Windows\PolicyDefinitions\en-US.
Open Group Policy Editor.
Click User Configuration/Computer Configuration > Administrative Templates > Microsoft Edge.
Double-click Configure Internet Explorer integration.
Select Enabled.
Under Options, set the drop-down value to Internet Explorer mode if you want the sites to open in IE mode on Microsoft Edge
Double-click Configure the Enterprise Mode Site List.
Select Enabled.
Under Options, type the location of website list. You can use one of the following locations:
Local file: file:///c:/Users/<user>/Documents/sites.xml
Click OK or Apply to save these settings
Restart Microsoft Edge and browse TMWeb URL set in the sites.xml.
You should be able to see TMWeb site open in IE mode. To verify this, check the internet explorer icon visible near the URL bar.