Policy
Drafts Folder Home Page
This policy setting allows you to modify the "Show home page by default for this folder" in the Home Page tab of the Drafts Properties dialog box. If you enable this policy setting, you will set the "Show home page by default for this folder" check box. You will also be able to enter a URL, which has a maximum limit of 129 characters. If you disable or do not configure this policy setting, the "Show home page by default for this folder" check box will not be checked.
491ca63e327e L_DraftsFolderHomePage Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\outlook\webview\drafts\urlHKCU\software\policies\microsoft\office\16.0\outlook\webview\drafts\showHKCU\software\policies\microsoft\office\16.0\outlook\webview\drafts\securityPolicy notes
This policy setting allows you to modify the "Show home page by default for this folder" in the Home Page tab of the Drafts Properties dialog box. If you enable this policy setting, you will set the "Show home page by default for this folder" check box. You will also be able to enter a URL, which has a maximum limit of 129 characters. If you disable or do not configure this policy setting, the "Show home page by default for this folder" check box will not be checked.