Graph API - How to create one-on-one chat for two Microsoft users on same tenant

Question

Graph API - How to create one-on-one chat for two Microsoft users on same tenant

Daniel Dugovic 0

Using https://learn.microsoft.com/en-us/graph/api/chat-post?view=graph-rest-1.0 I am trying to create a one-on-one chat between two Microsoft users on my local domain, so my business can replace our proprietary chat server. Instead, there are various errors serializing or deserializing the request (regardless of whether I use Microsoft's code example or various code examples found across the internet).

If this is possible using Graph API, it would be nice if it could also be possible using Microsoft Graph SDK for Java. (Yesterday I filed a bug on that project's GitHub issue tracker.)

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Answer 1

Phoebe-N 2,055 Microsoft External Staff Moderator

Hi @Daniel Dugovic Welcome to Q&A community!

To better understand your situation, could you please clarify if your type of account is for Business/ School or Personal?

Moreover, please share a screenshot of when "there are various errors serializing or deserializing the request"? It'd be helpful for us to identify what's the root cause.

In case you are having a Work/ School account and are in an urgent situation with Admin privilege, I recommend submitting a support ticket in the Admin center so Technical Support Specialist can deep dive into your issue and provide with in-time solutions. For detailed instructions on how to get support, please refer to Get support - Microsoft 365 admin.   

If you’re not the Global Admin within your organization, you can find guidance on locating them here: How do I find my Microsoft 365 admin? - Microsoft Support.  

For additional assistance, use this link to find the appropriate contact number: Global Customer Service phone numbers - Microsoft Support  

Looking forward to your response.

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Daniel Dugovic 0

Thanks, if my admin. grants permission likely we'll file a support ticket.

For those curious, although there is no screen, there is an API error (more details at https://github.com/microsoftgraph/msgraph-sdk-java/issues/2452):

com.microsoft.graph.models.odataerrors.ODataError: Provided payload is invalid. Errors - Key - '' , Error - 'An undeclared property 'user' which only has property annotations in the payload but no property value was found in the payload. In OData, only declared navigation properties and declared named streams can be represented as properties without values.'
   at com.microsoft.graph.models.odataerrors.ODataError.createFromDiscriminatorValue(ODataError.java:36)   at com.microsoft.kiota.serialization.JsonParseNode.getObjectValue(JsonParseNode.java:212)
   at com.microsoft.kiota.http.OkHttpRequestAdapter.lambda$throwIfFailedResponse$0(OkHttpRequestAdapter.java:706)
   at com.microsoft.kiota.ApiExceptionBuilder.<init>(ApiExceptionBuilder.java:26)
   at com.microsoft.kiota.http.OkHttpRequestAdapter.throwIfFailedResponse(OkHttpRequestAdapter.java:705)
   at com.microsoft.kiota.http.OkHttpRequestAdapter.send(OkHttpRequestAdapter.java:307)
   at com.microsoft.graph.chats.ChatsRequestBuilder.post(ChatsRequestBuilder.java:129)
   at com.microsoft.graph.chats.ChatsRequestBuilder.post(ChatsRequestBuilder.java:113)
   at com.tms.common.dev.microsoft.GraphAPI.createChat(GraphAPI.java:86)

Daniel Dugovic 0 Reputation points

2025-08-05T21:58:19.54+00:00

The Microsoft Graph Support team only supports Graph API, not Microsoft Graph SDK for Java. Seemingly there is no way to obtain support for use of Microsoft Graph SDK for Java.
Phoebe-N 2,055 Reputation points Microsoft External Staff Moderator

2025-08-06T08:43:26.0133333+00:00

Hi @Daniel Dugovic

Thank you for sharing the information. If you are not having an Admin account, I'd recommend you post your answer on Microsoft's Tech Community platform where Technical Experts can help you with the issue with Graph API and Graph SDK and provide you with more proper solutions. Thank you so much for your cooperation and patience.

Please let me know if you have any updates. Looking forward to your response.
Phoebe-N 2,055 Reputation points Microsoft External Staff Moderator

2025-08-08T10:33:44.13+00:00

Hi @Daniel Dugovic

Good day! I hope you're doing well!

It has been a while and i am writing to see how things are going with this issue. Have you had a chance to check the reply provided? Have you posted on Microsoft's Tech Community platform? If yes, how did it go with the issue?

Please feel free to let me know if there are any updates or if you need any further support.

If you think my reply is helpful to you, kindly mark it as an answer so others with the same concerns can see it immediately when they need.

Thank you so much for your time and kindness.
Phoebe-N 2,055 Reputation points Microsoft External Staff Moderator

2025-08-11T10:48:57.2933333+00:00

Hi @Daniel Dugovic

I hope this message finds you well.

This is my second follow-up to check whether your issue has been resolved. In case your problem persists or if there are any new issues, please let me know. I am happy to assist.

While waiting for your response, I will continue tracking other customer questions on the forum to ensure everyone receives timely support. If you have additional questions, please feel free to tag my name in your reply so I can assist you promptly.

Looking forward to hearing from you soon.

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Graph API - How to create one-on-one chat for two Microsoft users on same tenant

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