By default, D365 Marketing will only send 1 email to 1 email address - even if there are multiple Contacts in the Journey with the same email. I believe this is called Deduplication - and there is even a setting to override it.

Today in Real Time Marketing, SMS is not deduplicated. Meaning, if I have 100 Contacts in a Journey with the same phone number - 100 SMS will be sent to the same number.

We would like an option to deduplicate SMS in real time marketing.