How to send a message to a specific user

[narita1234]

I want to send a message to a specific user from external service using the user ID.

In the sample code, I can use "getPagedInstallations" to loop through all users.

-----------------------------------------

const pagedData = await notificationApp.notification.getPagedInstallations(

  pageSize,

  continuationToken

);

const installations = pagedData.data;

for (const target of installations) {

   ...

}

-----------------------------------------

I think this is bad performance.

Is there any other better way?

[#2]

@narita1234 -
You can send a new chatMessage in the specified chat using this API.
Send message in a chat - Microsoft Graph v1.0 | Microsoft Learn

This API cannot create a new chat; you must use the list chats method to retrieve the ID of an existing chat before creating a chat message.

If you want to create a new chat you can use below API:

 Create chat - Microsoft Graph v1.0 | Microsoft Learn

Thanks, 

Prasad Das

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