Graph mail api - get list of emails and include outlook custom columns

Question

Hi,

We are using MS Graph api to fetch user's emails from Outlook.

Is there a way to fetch and filter by values of custom columns added in Outlook?

I have tried adding $expand to the odata query but that didn't work.

I tried something like this i Graph explorer:

https://graph.microsoft.com/v1.0/me/messages?$select=id,lastModifiedDateTime,from,toRecipients,subject&$expand=fields

But I am getting an BadRequest (400) response:

Parsing OData Select and Expand failed: Could not find a property named 'fields' on type 'microsoft.graph.message'.

Thanks,

Zarko

Answer 1

Hello Zarko Petrovic,

Thanks for reaching out. There is no property called fields in the message object hence you are receiving the Bad Request error. The below article lists all the properties of the message object and these properties are the ones returned in the /messages api call response.

https://learn.microsoft.com/en-us/graph/api/resources/message?view=graph-rest-1.0

Retrieval of custom columns is not supported. I would suggest posting your query on the Graph feedback forum.

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Thanks.