Send & Receive Issues

Fix Microsoft Bookings Reminder Email Replies Not Delivered

Jason MillerJason Miller Oct 23, 2026 868 views

Question details

The user is unable to receive customer replies sent in response to Microsoft Bookings reminder emails, despite successfully receiving replies to the initial booking confirmations.

Fix Microsoft Bookings Reminder Email Replies Not Delivered
Product
Microsoft Bookings
Device & OS
not provided
Scenario
A customer receives an automated reminder email for an upcoming appointment and replies to it, expecting the business administrator to receive the message.
Observed behavior
The reply email is not delivered to the administrator's inbox, and Microsoft 365 message traces show no activity for these specific reminder replies.
Before you start

Ensure you have administrator access to your Microsoft 365 tenant and the Microsoft Bookings business page. You will need Exchange admin permissions to run a message trace.

Solution 1Recommended

Verify Bookings Settings and Run a Message Trace

Check your business information and use the Microsoft 365 Exchange admin center to trace the missing emails to see if they are reaching your tenant.

A message trace will help determine if the email reached your organization's Exchange server and was blocked/filtered, or if it never arrived at all.

1
Check Business Information

Open Microsoft Bookings and navigate to the 'Business information' page to confirm the correct administrator email address is listed.

2
Verify Notification Settings

Check the 'Services' settings to ensure that email and SMS notifications are properly enabled for the affected booking services.

3
Access Exchange Admin Center

Log into the Microsoft 365 Exchange Admin Center with your global or Exchange administrator credentials.

4
Run Message Trace

Go to 'Mail flow' > 'Message trace'. Start a trace using the customer's email address as the sender, and set the date range to match when they sent the reminder reply.

5
Review Trace Results

Review the trace report. If you see activity for new or updated bookings but none for the reminder reply, the routing is likely failing at the Bookings service level.

Verify Bookings Settings and Run a Message Trace
Trace Report Delay: Message traces for emails older than 10 days may take several hours to process and become available for review.
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Frequently Asked Questions

Why do I receive initial booking replies but not reminder replies?

Microsoft Bookings may route initial confirmation emails differently than automated reminder emails. In some configurations or service builds, the 'Reply-To' header on reminder emails may not map back to the administrator's inbox properly, causing the reply to be dropped.

What does it mean if a message trace shows no activity?

If an Exchange message trace shows absolutely no activity for a specific email, it means the email never reached your Microsoft 365 tenant's Exchange servers. This usually indicates a routing issue on Microsoft's end or that the customer's reply was blocked before reaching your environment.

Can I change the 'Reply-To' address for Microsoft Bookings reminders?

By default, Bookings uses the email address specified in your Business Information settings. However, granular control over specific reminder email headers is limited, which is why reaching out to Microsoft Support is recommended if replies fail to deliver.