Hi, Begineer's quesiton on Graph API I am trying to get emails and attachment from O365 My admin has already registered the application. Everyone within Org has read access Can I generate token silently (by providing user id and pwd. later continue using it?)? or It should come from admin? What is authProvider in this example , sample code below? > GraphServiceClient graphClient = new GraphServiceClient( authProvider ); > > var messages = await graphClient.Me.Messages > .Request() > .GetAsync(); I have application id from azure portal, whatelse would I need to get this going Apprecite any help on these lines.

The microsoft identity platform supports the OAuth 2.0 Resource Owner Password Credentials(ROPC) grant, which allows an application to sign in the user by directly handling their password. Here is the documentation for your reference: https://learn.microsoft.com/en-us/azure/active-directory/develop/v2-oauth-ropc If the answer is helpful, please click " Accept Answer " and kindly upvote it. If you have extra questions about this answer, please click " Comment ". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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Accepted answer

Zehui Yao_MSFT 5,856 Reputation points

2022-02-22T02:28:59.427+00:00

The microsoft identity platform supports the OAuth 2.0 Resource Owner Password Credentials(ROPC) grant, which allows an application to sign in the user by directly handling their password.

Here is the documentation for your reference:
https://learn.microsoft.com/en-us/azure/active-directory/develop/v2-oauth-ropc

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2 people found this answer helpful.
CarlZhao-MSFT 41,941 Reputation points

2022-02-23T06:38:37.71+00:00

Hi @SSinhg Would you please provide us with an update on the status of your issue?

SSinhg 286 Reputation points

2022-02-23T22:45:02.377+00:00

Thanks @CarlZhao-MSFT

I have not moved an inch :(

Code suggested here doesn't work i.e. ClientCredentialProvider is unknow and errors out as pointed out here
I don't have a token so the question is can I generate using my id and password?

Also here, this doc say I need token
https://learn.microsoft.com/en-us/azure/active-directory/develop/scenario-desktop-call-api?tabs=dotnet

SSinhg 286 Reputation points

2022-02-23T22:47:11.427+00:00

My situation is we have

0365

On Azure portal I can see an 0365 application registered.

I don't have token

Question
Can I download the attachment using my email id and password from 0365, If yes, Please share a complete code....(Sorry for being blunt and lost).

Appreciate the help and effort. thanks

Zehui Yao_MSFT 5,856 Reputation points

2022-02-24T10:15:57.587+00:00

Hi @SSinhg , Here is the code flow:

var scopes = new[] { "User.Read" }; // Multi-tenant apps can use "common", // single-tenant apps must use the tenant ID from the Azure portal var tenantId = "common"; // Value from app registration var clientId = "YOUR_CLIENT_ID"; // using Azure.Identity; var options = new TokenCredentialOptions { AuthorityHost = AzureAuthorityHosts.AzurePublicCloud }; var userName = "adelev@contoso.com"; var password = "P@ssword1!"; // https://learn.microsoft.com/dotnet/api/azure.identity.usernamepasswordcredential var userNamePasswordCredential = new UsernamePasswordCredential( userName, password, tenantId, clientId, options); var graphClient = new GraphServiceClient(userNamePasswordCredential, scopes);

SSinhg 286 Reputation points

2022-02-24T12:44:39.103+00:00

Thanks @Zehui Yao_MSFT
Below is the error i got after executing your code

I am using same login id and pwd that I would use for AD verification.

UsernamePasswordCredential authentication failed: Response status code does not indicate success: 407 (ProxyAuthenticationRequired).
See the troubleshooting guide for more information. https://aka.ms/azsdk/net/identity/usernamepasswordcredential/troubleshoot

CarlZhao-MSFT 41,941 Reputation points

2022-02-25T01:48:18.563+00:00

Are your users MFA enabled? ROPC flow is not supported for users with MFA enabled.

SSinhg 286 Reputation points

2022-02-25T09:43:33.407+00:00

https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-userstates#view-the-status-for-a-user

I stumbled over this arcticle and realised it not as straight forward as it seems :)

Thanks everyone for help - Now i am considering a Power Automate Approach.

CarlZhao-MSFT 41,941 Reputation points

2022-02-25T10:00:43.177+00:00

Why don't you use auth code flow? It supports MFA. If you use auth code flow I can provide you the code.

SSinhg 286 Reputation points

2022-02-25T10:05:07.637+00:00

@CarlZhao-MSFT thanks I would love to give it a go....
I want to learn and absorb as much knowledge as I can.

CarlZhao-MSFT 41,941 Reputation points

2022-02-25T10:11:17.643+00:00

Hi @SSinhg Can you ask a new question? Then share me the link of the thread.
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