Forum Discussion
Edge PDF Preview (From Edge 100+) for Outlook and Explorer
https://docs.microsoft.com/en-us/deployedge/microsoft-edge-relnote-stable-channel Indicates that Edge 100 now comes with an PDF Previewer for Explorer and Outlook. I have Edge Stable 101.0.1210.47 i...
There are other pre-requisites, namely the installation of WebView (https://developer.microsoft.com/en-us/microsoft-edge/webview2/consumer/ if you currently don't have it) and the reg key Computer\HKEY_CLASSES_ROOT\.pdf\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f} needs to have a value of {3A84F9C2-6164-485C-A7D9-4B27F8AC009E}.
I had the same issue and as mentioned above, manually adding this key corrected the issue for me.
HKEY_CLASSES_ROOT\.pdf\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f}
(default) = {3A84F9C2-6164-485C-A7D9-4B27F8AC009E}
I believe the cause was removing Adobe Reader.