Default format for 'Publish'
Supported on: At least Windows Server 2008 R2 or Windows 7
Registry
HKCU
software\policies\microsoft\office\16.0\common\internet Options
publishformat enum - Web Archive (*.mht)
->
2 - Web Page (*.htm)
->
1 - Default
->
0
Description
"Web Archive (*.mht)": The Publish command creates a Web Archive file. | "Web Page (*.htm)": The Publish command creates an HTML file. | "Default": The Publish command uses the default Web page format for publishing.