Search mails using graph api - microsoft-graph-api

Question

we are using microsoft graph api list and send emails. The new requirement is to search emails. When following URL is tried then we are getting errors. Can someone suggest if this is the right api to search mails messages? or what kind of permissions are missing?
URL : https://graph.microsoft.com/v1.0/search/query (documentation here)
Error using following request body : "Application permission is only supported for the following entity types:site, list, listItem, drive and driveItem."
{
"requests": [
{
"entityTypes": [
"message"
],
"query": {
"queryString": "hello"
},
"region": "NAM",
"from": 0,
"size": 25
}
]
}
Error returned::
"code": "System.UnauthorizedAccessException",
"message": "Application permission is only supported for the following entity types:site, list, listItem, drive and driveItem.",
"target": "",
"httpCode": 403
When tried to change the body to get list, as expected it did not return list, as we have only mail.readwrite permissions.
{
"requests": [
{
"entityTypes": [
"listItem"
],
"query": {
"queryString": "contoso"
},
"region": "NAM",
"sharePointOneDriveOptions": {
"includeContent": "privateContent,sharedContent"
}
}
]
}
Error Returned:
"code": "System.UnauthorizedAccessException",
"message": "Access to ListItem in Graph API requires the following permissions: Sites.Read.All or Sites.ReadWrite.All. However, the application only has the following permissions granted: Mail.ReadWrite, Mail.Read",
"target": "",
"httpCode": 403

Answer 1

As per the doc - Known limitation , You can access only the signed-in user’s own mailbox. Searching delegated mailboxes is not supported. try to write query to search your own message.
Hope this helps
Thanks