Adding attachment to Meeting Invites You Do Not Own

This has been posted in Microsoft Learn. Unable to attached outlook item or document to calendar invite It has been patched to resolve an exploit and the body of the meeting is now read only.

Hello ZM2023_,,

Good day! Thank you for posting to Microsoft Community. We are happy to help you.

After thorough research and consulting, it has been determined that this issue seems to be caused by a recent update and Microsoft not yet sharing the any restoration information for this feature. We have more threads on the same issue and the current workaround is reverting back to previous office version and check whether there is any difference. Please refer to steps below *carefully* or make sure you have a backup.

Open an elevated Command Prompt window. To do this:

• Click Start, type cmd in the Start Search box and then click Run as administrator.
• From there, type cd "\Program Files\Common Files\microsoft shared\ClickToRun"
• Then type: officec2rclient.exe /update user updatetoversion=16.0.16626.20134

Press Enter. So, you will have something like this.

Version 16626.20134 is the previous one to 16626.20170 in the current channel. Reference: Update history for Microsoft 365 Apps (listed by date) - Office release notes | Microsoft Learn.

After reverting, since office automatically checks for updates on a regular basis. To prevent Office from automatically installing new updates, follow these steps:

1. Start Outlook.
2. Click File, and then click Office Account.
3. In the Product Information column, click Update Options, and then click Disable Updates.

More info/detailed steps on how to revert to the previous office version here. How to revert to an earlier version of Office - Microsoft Support

Furthermore, I invite you to vote and add your own comments for this feature feedback to be returned, Ability to add notes or edit meeting invites sent by other users or third parties · Community (microsoft.com). Many features of our current products are designed and upgraded based on customers’ feedback. You can also make suggestions on that website and hope Microsoft will notice this in the future.

Looking forward to your response.

Best Regards,

De Paul.

I too have this same problem! I am a scheduler for a high level government agency head. Her calendar receives many invites from outside our agency and I ALWAYS have been able to add talking points, agenda's, background to the invite and even make changes to the subject line noting attachments which can only be seen by her. I don't know who thought it was a good idea to change a very helpful feature in Outlook and I know I'm not the only one who is now facing having to do things differently. PLEASE PUT BACK THIS FEATURE ASAP!!!

When you decide there's something you want to change in Outlook, maybe ask people who use Outlook 24/7 what they think before making any changes.

Frustrated Scheduler

Carol

Hello ZM2023_,

Thank you for posting in Microsoft Community, we are glad to assist you here.

As per your description shared, we understand you are having concerns in adding attachment to Meeting invites you do not own in Outlook.

It’s a reasonable that any modification make by an attendee on the meeting is not visible to others for any change make by the attendee is not updated (synced) to others’ calendars. And as we tested from our side, we are afraid that by now, it is not viable for attendee to edit the meeting (like include an attachment) directly.

A method that maybe helpful is to reply the meeting invitation email with your wanted attachments included and let the organizer include those attachments for you. When you receive an invitation email with options to respond, click Accept and choose "Edit the Response before Sending".

You can as well add the attachment after opening the event as in the screenshot below

And then include the required attachments in the response and send the email. If this method doesn’t meet your requirement, could you please provide your outlook version for further investigation?

In the meantime, you may create an entry as a feature suggestion in the Feedback Portal at Outlook · Community (microsoft.com), Other users may vote it and make it more visible to the service team so that it may be considered for future upgrades.

Thank you for your time and please feel free to get back to us if you have further concerns,

Sincerely,

De Paul | Microsoft Community Moderator