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User Configuration-> Administrative Templates-> Google-> Google Chrome-> Extensions-> Configure the list of force-installed apps and extensions.
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Value: maafgiompdekodanheihhgilkjchcakm.Reg Key: HKEY_CURRENT_USER\Software\Policies\Google\Chrome\ExtensionInstallForcelist.You must force Chrome to allow you to install this extension install either by Registry key or Policy.Please contact your IT administrator for help installing the extension." This message has a digital signature, but it wasn't verified because the S/MIME extension isn't installed.
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