Changes in repeating calendar entries have to be sent in one email to O365 and other external users

The current behaviour:

User creates an appointment/meeting that is repeating
The repeating is one day a week, for five weeks, for example every Monday at 9 o'clock
The user invites one external user, who uses Exchange/Outlook/O365
The external user gets one email with the repeating meeting
Everything is correct, so far.

Now the user adds one additional external attendee.
Then he will be asked, if he would send the change to all users and he says yes.
Then the problem appears:
Notes sends one email per occurence of the meeting, in this case five emails to every external attendee.

In this example that would generate 5 emails, but assuming an invitation for 52 weeks, that the external users get 52 emails.

I have discussed this with the HCL support.

The explanation in short is that Microsoft implents the iCalendar standard different to Notes.

For HCL: For the long explanation please have a look in Case CS0838643.

Thanks to HCL for the tests and the detailed explanation.
This will help for understanding. I am not amused that Microsoft does a different implementation. But I think, HCL should implement it the same way.
Even if Gmail and Yahoo make it better than Microsoft, Gmail and Yahoo are not the typical mailsystems for the business world, but Microsoft is and we all and our customers have to interact with Microsoft user every time.

So I would kindly ask you to provide a good solution for this problem.

Kind regards, Katja Bieske