Hi @Shibu Tharakan ,
Per my test, we are unable to get the thumbnail. Here is a JSON representation of the thumbnail resource.
{
"height": "Int32",
"sourceItemId": "String",
"url": "String",
"width": "Int32",
"content": "Stream"
}
The thumbnail contains several properties. We are unable to present a collection to the field. If you want to get thumbnails. Please refer to following document
https://learn.microsoft.com/en-us/graph/api/driveitem-list-thumbnails?view=graph-rest-1.0&tabs=http
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