Calendar Problems

How to Fix Microsoft Bookings Appointment Times and Buffer Duration Issues

Camila Milosovich Sep 28, 2026 869 views

Question details

Users are experiencing irregular appointment start times and unexpected durations in Microsoft Bookings due to conflicts with buffer times and increments.

How to Fix Microsoft Bookings Appointment Times and Buffer Duration Issues

Product: Microsoft Bookings
Device & OS: not provided
Scenario: Scheduling appointments using Microsoft Bookings with existing Outlook calendar events and customized buffer times.
Observed behavior: Appointments generate unusual start times and durations, such as 2:55 or 3:25, instead of aligning with standard scheduling increments.

Before you start

Ensure you have administrative access to your Microsoft Bookings page and can view the connected Outlook calendars to verify existing appointments.

Solution 1Recommended

Align Time Zones and Adjust Booking Increments

Synchronize your Outlook and Bookings time zones and adjust your booking increments to match your buffer durations to prevent off-cycle start times.

Microsoft Bookings calculates availability dynamically based on service duration, buffer time, and time increments. If an existing Outlook appointment has a 5-minute buffer, Bookings may automatically offer the next slot 5 minutes off the hour (e.g., 2:55) rather than waiting for the next clean interval.

Verify Time Zone Settings

Open Microsoft Bookings and Outlook on the web. Navigate to Settings in both applications and verify that they are configured to the exact same time zone.

Modify Time Increments

In Bookings, go to 'Services' and edit the affected service. Adjust the 'Time increments' in the scheduling policy to align with your buffer times (for example, setting increments to 15 minutes if you use a 15-minute buffer).

Review Staff Calendars

Check the connected staff Outlook calendars for existing appointments with customized buffer times that might be forcing Bookings to calculate unusual start times.

Align Time Zones and Adjust Booking Increments

Solution 2

Consult the Microsoft Bookings Community

If availability calculations remain incorrect after adjusting settings, seek specialized troubleshooting from the Microsoft Bookings community.

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Frequently Asked Questions

Why does Microsoft Bookings show appointment times like 2:55?

This occurs when existing appointments on your Outlook calendar have custom buffer times (like 5 or 15 minutes). Bookings calculates availability directly from the end of those buffers rather than snapping to standard hour or half-hour increments.

How do I change the time increment in Microsoft Bookings?

Open your Bookings page, select the 'Services' tab, and edit the specific service. Scroll to the 'Scheduling policy' section, where you can adjust the 'Time increments' drop-down menu to your preferred interval.

Does Microsoft Bookings sync automatically with Outlook time zones?

While they are designed to stay in sync, mismatches can happen if your account region settings are altered. You should manually verify that the Outlook Web App settings and the Bookings calendar settings are both locked into the identical time zone.

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