Change the limit for the number of nested embedded messages

By default, the limit is 50 embedded messages when an e-mail message is converted from MIME to MAPI. The number can be set to any positive integer. This helps prevent scenarios in which Outlook hangs while attempting conversion.

Supported on: At least Windows Vista

Registry Hive	HKEY_CURRENT_USER
Registry Path	Software\Policies\Microsoft\Office\12.0\Outlook\Options\Mail
Value Name	EmbeddedMessageLimit
Value Type	REG_DWORD
Default Value	50
Min Value
Max Value	99999

outlk12.admx

Administrative Templates (Computers)

Calendar Printing Assistant for Microsoft Office Outlook 2007 (Machine)
- Directory where all calendar designs are located
- Directory where all templates are located
Microsoft Office 2007 system (machine)
- Miscellaneous
  - Document Inspector
  - File Previewing
- Security Settings
Microsoft Office Excel 2007 (Machine)
- Converters
  - Turn on an external converter as the default for a file extension
- Miscellaneous
  - Open Hyperlinks to documents in Windows Internet Explorer
Microsoft Office InfoPath 2007 (machine)
- Security
Microsoft Office PowerPoint 2007 (Machine)
- Miscellaneous
  - Open Hyperlinks to documents in Windows Internet Explorer
Microsoft Office Visio 2007 (machine)
- Open Hyperlinks to documents in Windows Internet Explorer
Microsoft Office Word 2007 (Machine)
- Converters
  - Turn on an external converter as the default for a file extension policy for Microsoft Office Word
- Miscellaneous
  - Open Hyperlinks to documents in Windows Internet Explorer

Administrative Templates (Users)

Calendar Printing Assistant for Microsoft Office Outlook 2007
Microsoft Office 2007 system
Microsoft Office Access 2007
- Application Settings
  - General
    - Default database folder
    - Number of documents in the Recent Documents list
  - International
  - Security
    - Trust Center
  - Web Options...
    - General
- 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 Office Excel 2007
Microsoft Office Groove 2007
- Groove Manager
  - Groove Manager Server Name
- Groove Account Configuration Code Required
Microsoft Office InfoPath 2007
Microsoft Office InterConnect 2007
- General Setting
  - Communicator Presence
  - Search Keyword MRU
- Internet Connection Setting
- Security Setting
  - Allow the intranet users to send/receive activities
  - Show (or not show) the list of certificates
Microsoft Office OneNote 2007
Microsoft Office Outlook 2007
Microsoft Office PowerPoint 2007
- Block file formats
  - Open
  - Save
- Customizable Error Messages
  - List of error messages to customize
- Disable Items in User Interface
  - Custom
    - Disable commands
    - Disable shortcut keys
  - Predefined
- Miscellaneous
  - Disable Slide Update
- New Presentation Links
- PowerPoint Options
Microsoft Office Project 2007
- Miscellaneous
  - Most Recently Used Template List Length
- Security
  - Tools | Macro
    - Security Level
  - Previous-version file formats
- Tools | Local Project Cache
  - Local Project Cache Location
  - Local Project Cache Size Limit in MB
- Tools | Options...
  - Calculation
    - Calculation options for 'Project1'
    - Calculation options for Microsoft Office Project
      - Automatic Calculation
      - Calculate all open projects
  - Calendar
  - Edit
    - Edit options for Microsoft Office 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 Office 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
    - Save Microsoft Office Project files as
  - Schedule
    - Schedule options for Microsoft Office Project
      - Show assignment units as
      - Show scheduling messages
    - Scheduling options for 'Project1'
  - Security
    - Enable untrusted intranet zone access to Project server
  - View
    - Calendar Type
      - Calendar Type
    - Show
    - Date Format
    - Default Project Currency
    - Default View
    - Project Summary Task
Microsoft Office Publisher 2007
- Disable Items in User Interface
  - Custom
    - Disable commands
  - Predefined
    - Disable commands
- Format
  - Prompt user when reapplying a style
- Miscellaneous
- Security
- Spelling
  - Check spelling as you type
- Tools | Options...
Microsoft Office SharePoint Designer 2007
- Default Authoring Options
- Disable Items in User Interface
  - Custom
    - Disable commands
  - Predefined
    - Disable commands
- Downloading Framework Components
- Miscellaneous
  - Remote Website Properties
    - Disable Optimize HTML on publish checkbox
Microsoft Office Visio 2007
- 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
  - Email message for 'Send To' commands
- Tools | AutoCorrect Options...
  - AutoFormat as you type
- Tools | Options...
  - Advanced
    - Advanced options
    - Color settings
    - File Paths
      - Add-ons
      - Drawings
      - Favorites Stencil Name
      - Help
      - My Shapes
      - Start-up
      - Stencils
      - Templates
    - Freeform drawing
      - Precision
      - Smoothing:
    - Ink tool
      - Auto-create speed
  - General
    - Drawing window options
    - General options
      - Number of documents in the Recent Documents list
      - Undo levels
  - Save/Open
    - Language for file conversion
      - Language for file conversion
    - Save options
      - Prompt for document properties on first save
      - Save AutoRecover info
    - Warnings options
      - Show file open warnings
      - Show file save warnings
    - Save Visio files as
  - Security
    - Macro Security
    - Trust Center
  - Shape Search
    - Results
    - Search for:
    - Show Shape Search pane
  - Units
    - Default units
  - View
    - Display options
    - Show
    - Stencil spacing
      - Characters per line
      - Lines per master
    - Text quality
Microsoft Office Word 2007