To start Outlook in safe mode, you have several easy methods to choose from:

1. Using the Ctrl Key:

• Close Outlook if it is open.
• Press and hold the Ctrl key on your keyboard.
• While holding Ctrl, click the Outlook shortcut on your desktop, Start menu, or taskbar.
• Keep holding Ctrl until a dialog box appears asking if you want to start Outlook in safe mode.
• Click "Yes" to confirm.
• If prompted, select your Outlook profile and click OK.
  This will launch Outlook in safe mode.

2. Using the Run Dialog:

• Press Win + R on your keyboard to open the Run dialog, or right-click the Start button and select Run.
• Type Outlook.exe /safe and click OK.
• Choose your profile if prompted and click OK.
  Outlook will open in safe mode.

3. Using Command Prompt:

• Open Command Prompt.

• Type the full path of the Outlook executable followed by /safe. For example:
  "C:\Program Files\Microsoft Office\root\Office16\Outlook.exe" /safe

• Press Enter.

• Select your Outlook profile if prompted to start Outlook in safe mode.

4. Creating a Custom Shortcut:

• Right-click on your desktop and select New > Shortcut.

• Enter the full path to Outlook.exe enclosed in quotation marks followed by /safe, e.g.
  "C:\Program Files\Microsoft Office\root\Office16\Outlook.exe" /safe

• Click Next and give the shortcut a name, then finish.

When Outlook runs in safe mode, it disables all add-ins, extensions, and customizations, allowing you to troubleshoot issues more easily. You will see "(Safe Mode)" in the title bar confirming you are in safe mode. These methods work on Windows PCs and are the most common and straightforward ways to start Outlook in safe mode for troubleshooting purposes.