Rely on CSS for font formatting

This policy setting allows you to configure the "Use Cascading Style Sheets (CSS) for appearance of messages" option found under Microsoft Outlook's File tab | Outlook Options | Mail | Message format.

If you enable this policy setting, the option is checked.

If you disable or do not configure this policy setting, the option is not checked.

Supported on: At least Windows 7

Registry Hive	HKEY_CURRENT_USER
Registry Path	software\policies\microsoft\office\16.0\common\mailsettings
Value Name	usecssinhtml
Value Type	REG_DWORD
Enabled Value	1
Disabled Value	0

word16.admx

Administrative Templates (Computers)

Microsoft Office 2016 (Machine)
Microsoft PowerPoint 2016 (Machine)
- Converters
  - Turn on an external converter as the default for a file extension
Skype for Business 2016
- Microsoft Lync Feature Policies

Administrative Templates (Users)

Microsoft Access 2016
- Application Settings
- Customizable Error Messages
  - List of error messages to customize
- Disable Items in User Interface
  - Custom
    - Disable commands
    - Disable shortcut keys
  - Predefined
    - Disable commands
    - Disable shortcut keys
- Miscellaneous
- Tools | Security
  - Workgroup Administrator...
    - Path to shared Workgroup information file for secured MDB files
  - Modal Trust Decision Only
Microsoft Excel 2016
Microsoft Office 2016
Microsoft OneNote 2016
- OneNote Options
Microsoft Outlook 2016
Microsoft PowerPoint 2016
Microsoft Project 2016
- Miscellaneous
- Project Options
  - Calculation
    - Calculation options for 'Project1'
    - Calculation options for Microsoft Project
      - Automatic Calculation
      - Calculate all open projects
  - Calendar
  - Customize Ribbon
    - Display Developer tab in the Ribbon
  - Edit
    - Edit options for Microsoft Project
    - Hyperlink appearance in 'Project1'
    - View options for time units in 'Project1'
      - Add space before label
      - Days
      - Hours
      - Minutes
      - Months
      - Weeks
      - Years
  - General
    - General options for 'Project1'
    - General options for Microsoft Project
    - Undo Levels
  - Interface
    - Project Guide settings for 'Project1'
      - Project Guide Content
      - Project Guide Functionality and Layout page
    - Project Guide settings
      - Display Project Guide
    - Show indicators and Option butons for
    - Disable Internal ID Matching
  - Save
    - Auto Save Options
    - File locations
      - Projects
      - User Templates
    - Tools | Local Project Cache
      - Local Project Cache Location
      - Local Project Cache Size Limit in MB
    - Save Microsoft Project files as
  - Schedule
    - Schedule options for Microsoft Project
      - Show assignment units as
      - Show scheduling messages
    - Scheduling options for 'Project1'
  - Security
  - View
    - Calendar Type
      - Calendar Type
    - Show
    - Date Format
    - Default Project Currency
    - Default View
    - Project Summary Task
Microsoft Publisher 2016
Microsoft Teams
- Prevent Microsoft Teams from starting automatically after installation
- Restrict sign in to Teams to accounts in specific tenants
Microsoft Visio 2016
- Customizable Error Messages
  - List of error messages to customize
- Disable Items in User Interface
  - Custom
    - Disable commands
    - Disable shortcut keys
  - Predefined
    - Disable commands
- Miscellaneous
- Visio Options
  - Advanced
  - Customize Ribbon
    - Display Developer tab in the Ribbon
  - General
    - User Interface Options
  - Proofing
    - AutoCorrect Options
  - Save
    - Offline Editing
      - Save checked-out files to
    - Save Documents
      - Prompt for document properties on first save
      - Save Visio files as
    - Turn off CAD/DWG functionality
  - Security
    - Macro Security
      - Enable Microsoft Visual Basic for Applications project creation
      - Load Microsoft Visual Basic for Applications projects from text
    - Trust Center
Microsoft Word 2016
Skype for Business 2016
- Microsoft Lync Feature Policies