Calendar Problems

How to Set 25- or 50-Minute Meeting Defaults for Microsoft 365 Users

Rana Garcia Oct 22, 2026 868 views

Question details

Administrators want to configure organization-wide default meeting durations of 25 or 50 minutes to encourage shorter meetings and reduce fatigue.

How to Set 25- or 50-Minute Meeting Defaults for Microsoft 365 Users

Product: Microsoft 365
Device & OS: not provided
Scenario: Attempting to enforce standardized, shortened default meeting times across an entire Microsoft 365 tenant using the Exchange admin center.
Observed behavior: The Exchange admin center allows configuring meeting-duration settings for individual Outlook users, but does not provide a global, organization-wide option.

Before you start

Verify your administrative privileges in the Exchange admin center, and note that users may need to manually update their own Outlook calendar settings.

Solution 1Recommended

Configure Default Meeting Durations on a Per-User Basis

Since Microsoft 365 currently lacks a tenant-wide setting, default meeting durations must be shortened individually via user settings or individual mailbox configurations.

While administrators cannot push a single toggle to shorten all meetings globally, individual users can easily adjust their own default meeting durations within their Outlook application or Outlook on the web. This creates healthy buffer times between back-to-back meetings.

Open Outlook Settings

Log in to Outlook on the web or open the desktop application, then click the Settings (gear) icon in the top right corner.

Navigate to Calendar Events

Select 'Calendar' from the left-hand menu, then choose 'Events and invitations'.

Shorten Event Duration

Check the box labeled 'Shorten duration for all events'. Choose whether to 'End events early' or 'Start events late', and select '5 minutes' for half-hour meetings or '10 minutes' for one-hour meetings.

Save Changes

Click 'Save' at the bottom to apply the new 25-minute and 50-minute defaults to your future calendar invitations.

Configure Default Meeting Durations on a Per-User Basis

Administrative Alternative: Administrators can technically adjust these settings on a per-mailbox level using Exchange Online PowerShell, but it must be applied to each user rather than as a global tenant policy.

Solution 2

Submit a Feature Request via the Microsoft Feedback Portal

Request the addition of an organization-wide meeting duration toggle directly from the Microsoft development team.

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Frequently Asked Questions

Why do organizations prefer 25- or 50-minute default meetings?

Shortening standard 30-minute and 60-minute meetings by 5 to 10 minutes creates built-in buffer times. This helps reduce meeting fatigue, allows employees to transition between back-to-back calls, and provides brief breaks to stretch or prepare for the next agenda.

Can I use PowerShell to set meeting durations for all users?

Yes, but not as a single global tenant setting. Administrators can write a PowerShell script using the Set-MailboxCalendarConfiguration cmdlet to loop through all existing mailboxes and set the shortened meeting durations. However, this must be re-run for newly created users.

Will shortened meeting durations apply to existing calendar events?

No. Changing the default meeting duration in Outlook settings only applies to newly created meeting invitations. Existing calendar events will retain their originally scheduled lengths.

Outlook & Email Problems