Calendar Problems

How to Automatically Accept Microsoft Bookings Appointments

Maira Mehtab Sep 22, 2026 869 views

Question details

The user wants Microsoft Bookings appointments to be automatically accepted in a shared calendar instead of showing up as tentative.

Product: Microsoft Bookings
Device & OS: not provided
Scenario: Managing a shared mailbox that receives Microsoft Bookings, where automatic acceptance recently stopped working.
Observed behavior: Bookings appointments appear as tentative in the shared calendar rather than being automatically accepted.

Before you start

Ensure you have Exchange administrator privileges for your Microsoft 365 tenant, as modifying calendar processing settings requires elevated administrative access.

Solution 1Recommended

Use Exchange PowerShell to Enable AutoAccept

Run a specific PowerShell cmdlet to configure a resource mailbox to automatically process and accept calendar requests.

This method applies specifically to resource (room or equipment) mailboxes. If the target is a standard shared mailbox, you may need to convert it to a resource mailbox first or use a mail-flow rule instead.

Connect to Exchange Online

Open PowerShell as an administrator and connect to your Exchange Online environment.

Run the Calendar Processing Cmdlet

Execute the following cmdlet: Set-CalendarProcessing -Identity "name" -AutomateProcessing AutoAccept (Replace "name" with the actual mailbox identity).

Verify Configuration

Send a test booking to the resource mailbox to verify that the appointment is automatically accepted instead of marked as tentative.

Resource Mailbox Requirement: The Set-CalendarProcessing cmdlet with the AutoAccept parameter works primarily for resource mailboxes.

Solution 2

Create an Exchange Online Mail-Flow Rule

If the mailbox is not a resource mailbox, you can set up a mail-flow rule to manage and process meeting requests.

Solution 3

Submit a Support Request via Microsoft 365 Admin Center

If bookings were automatically accepted until recently with no configuration changes, it may require backend investigation by Microsoft.

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Frequently Asked Questions

Why are my Microsoft Bookings showing as tentative?

By default, if the receiving mailbox is not configured to automatically accept meeting requests (or if it is a standard shared mailbox instead of a resource mailbox), Exchange marks incoming bookings as tentative until they are manually approved.

Can I use Set-CalendarProcessing on a standard shared mailbox?

The AutoAccept parameter in the Set-CalendarProcessing cmdlet is designed specifically for resource (room or equipment) mailboxes and generally will not function as expected on standard shared mailboxes.

What if I purchased Microsoft 365 through a reseller and need support?

If your subscription is managed by a reseller and your global administrator cannot create a service request directly in the Microsoft 365 admin center, you must contact your reseller's support team for backend troubleshooting.

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