Outlook on the web does not currently offer a built-in feature to select shortened event durations (e.g., 5 or 10 minutes) from a dropdown. However, you can manually enter custom start and end times in 5-minute increments when creating an event.

🧭 How to Set a Custom Event Duration

1. Open your Outlook calendar in the web browser
2. Click New Event at the top of the screen
3. Enter the event title and attendees as needed
4. In the time settings, click the end time field
5. Manually type your desired end time (e.g., change 14:30 to 14:05)
6. Click Save or Send to finalize the event

📌 Notes

• This method allows for precise scheduling, especially useful for short meetings or buffer slots
• Outlook supports 5-minute increments, even if not listed in the default dropdown
• Be sure to confirm time zone settings if coordinating across regions