application/octet-stream error using HTTP azure AD connect to add members to a marketing list in dynamics365

[Anonymous]

I am receiving an output error from HTTP azure connect AD when attempting to ad members to a marketing list. Below is image.

I am following this topic to add the members where the error I have was referred to but not resolved so hoping someone can help.

https://community.dynamics.com/365/marketing/f/dynamics-365-for-marketing-forum/359819/adding-a-cont...

I did add a line of code (as suggested in another post to the body (highlighted in red box below) but it hasn't made any difference.

[ManishJain]

Hi @Anonymous ,

Please ensure following steps are done : 

1. List should be static , should not be locked(Locked --> No), Targeted At field should be contact

2. Use Perform an unbound action from CDS (current environment) connector

3. Put the following values in that :

List id : Guid of the list that you want to add members to.

Members : Array , so if you are adding single contact just use 

contacts(GUID)

Thanks

[Anonymous]

Thanks ManishJain

However, I don't/can't utilise the CDS solution as CDS not enabled on environment I am using. Instead I am connecting to our Dynamics 365 application via the D365 connector and then using the HTTP invoke request to add to the Marketing list. I am following the suggestion in the link I provided in my original post and the user does make reference to the same error I received but he didn't get a response either. So the solution needs to be on the HTTP with Azure connector. 

[ManishJain]

Hi @Anonymous ,

Just use the following code in the body of http request. Also in the url you do not need to put full url, it should be

/api/data/v9.1/AddListMembersList

{
"List": {
"listid": "GUID",
"@odata.type": "Microsoft.Dynamics.CRM.list"
},
"Members": [{
"contactid": "GUID",
"@odata.type": "Microsoft.Dynamics.CRM.contact"
}]
}

Thanks