Updated Calendar Meeting - not sending inbox notifying receipients

Hi @Thomas Brandy (BSH US/SM-SAD), 

Good day, I hope you are doing well. 

This behavior can certainly appear inconsistent, particularly when Outlook sometimes prompts whether updates should be sent to specific attendees and at other times does not. 

Based on the scenario you described, I tested the behavior and found that when meeting details are updated, other than the attendee list, Outlook still sends an update email to all attendees, but it does not display a prompt asking who should receive the update. 

However, when the attendee list is changed, Classic Outlook displays a prompt asking whether the update should be sent only to the added or removed attendees, or to all attendees. 

In summary, the behavior you are seeing is expected. The prompt appears only when changes are made to the attendee list. For any other meeting detail changes, Outlook still sends an update to attendees automatically, without showing that prompt. 

I understand how important this functionality is for your workflow, therefore, I recommend submitting feedback directly to Microsoft via the Feedback Portal to help prioritize this feature in future updates.  

Sharing your experience through this channel is the most impactful way to advocate for a change that would benefit you and other users.      

Note: As community moderators, we kindly ask for your understanding that our access to internal development details is limited. Our primary role is to guide users toward the appropriate resources and support channels. While we may not have  influence product design decisions and have limited access to internal development details , we’ll continue doing our best to support you within the scope of our responsibilities.          

Once you’ve submitted your feedback, feel free to share the link here. I’d be happy to upvote it to help increase its visibility.  Moreover, if you are unable to submit feedback, please inform me at your convenience. In that case, I will gladly assist by submitting it on your behalf to ensure your request is properly captured.              

Additionally, as other users have raised similar concerns and may not be aware of where to share their feedback, I hope this response helps clarify the situation and suggests a potential next step. Upvoting this information can make it more visible to others in the community who may be facing the same issue, making it easier for them to find guidance and contribute their feedback as well.        

Thank you again for your time and for raising this important usability concern. If you have any further questions or need additional assistance, please don’t hesitate to reach out.        

Wishing you a smooth rest of your day. 

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In classic Outlook for Windows, whether attendees get an inbox notification or only a silent calendar update depends on:

1. The Outlook version and channel in use.
2. The type of change made to the meeting (attendees vs. time/location/subject, etc.).
3. Whether the change is treated as a “full update” by Exchange.
4. Whether any attendees have responded yet.

From the documented behavior:

• In newer builds (version 2305 and later), certain changes are treated as automatic full updates. In these cases Outlook does not show the Send Update to Attendees prompt, and Exchange sends the update directly to attendees’ Inboxes, or silently updates their calendars depending on the scenario.
• In other scenarios, Outlook intentionally does not send a notification at all and just updates the calendar entry.

Key points from the documented scenarios:

1. If the organizer is on version 2305 or later and changes options that are considered full updates (subject, start/end time, location/room, recurrence, time zone, Do Not Forward, Hide attendee list, sensitivity labels, or certain organization settings), Outlook may skip the prompt and automatically send updates, or update without a visible prompt depending on the exact case.
2. If no attendees have responded yet, or all attendees are group mailboxes, or a delegate is involved, Outlook may again skip the prompt and handle updates automatically.
3. In some cases (for example, certain changes where attendees are not changed and the meeting doesn’t require an update), Outlook will neither prompt nor send a notification.

Because this behavior is built into newer Outlook/Exchange logic, there is no global setting in classic Outlook to “always show the prompt and always send an inbox notification.” To maximize the chance that attendees receive explicit update messages:

1. Ensure Outlook is fully updated to a supported build, since older builds had bugs where prompts were suppressed or updates were misrouted.
2. When changing meetings, prefer editing the meeting in classic Outlook and explicitly using Send Update after making changes.
3. When adding/removing attendees only, use the prompt (when it appears) to send updates to all attendees instead of only added/removed attendees.

If Outlook still inconsistently prompts, and the environment matches the documented scenarios (version 2305+ with shared calendar improvements), this is by design and not configurable to “always send an inbox notification” for every change.

References:

• "Send update to attendees" prompt not displayed when updating meetings
• Change an appointment, meeting, or event in Outlook
• Updates for a meeting request are sent to all attendees directly in an Exchange Server 2010 environment
• Outlook unexpectedly stops prompting and automatically sends Meeting updates to all attendees