I'm using microsoft graph api to read emails from outlook, the api is working fine when reading emails from certain accoounts but isn't reading emails from the accounts in other domain(gmail)

Question

i'm using msal to generate authentication token for the application and the following:
authotity: 'https://login.microsoftonline.com/{tenant_id}'

endpoint: https://graph.microsoft.com/v1.0/users/{user_id}/messages

params = { '$filter': f"receivedDateTime ge 2024-05-18T06:40:16Z and from/emailAddress/address eq '{SENDER_EMAIL}'", '$top': num, # Adjust the number of messages to fetch as needed '$select': 'from,subject,receivedDateTime,bodyPreview,body', '$orderby': 'receivedDateTime desc',}

if subject is not None: params['$filter'] = params['$filter'] +
f" and startsWith(subject,'{subject}')" headers = { 'Authorization': f'Bearer {self.access_token}', 'Content-Type': 'application/json', 'Prefer': 'IdType="ImmutableId"', } response = requests.get(endpoint, headers=headers, params=params,)

Answer 1

Hi @SANTOSH PANDEY

According to the documentation, there are only two situations where you can access other users' mail. However, the scope of shared mailboxes is limited to people within the organization and cannot be shared for accounts in other domains, so if you need to access mail from other domain users, you need to use application permissions.

More details can be found at this link:

https://learn.microsoft.com/en-us/graph/api/user-list-messages?view=graph-rest-1.0&tabs=http

Hope this helps.

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