Disable password to open UI

This policy setting controls whether Office 2013 users can add password encryption to documents. (Users would access this feature in Microsoft Office tab--click Info, click Protect Document, then click Encrypt with Password.)

If you enable this policy setting, users cannot password protect their 2013 Office documents.

If you disable or do not configure this policy setting, users can encrypt their 2013 Office files with passwords.

Supported on: At least Windows 7
Registry HiveHKEY_CURRENT_USER
Registry Pathsoftware\policies\microsoft\office\15.0\common\security
Value Namedisablepasswordui
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

office15.admx

Administrative Templates (Computers)

Administrative Templates (Users)