Microsoft Graph with multiple users under the same account - problem with Email Sending

Question

Hi,

So we have a client with multiple users under the same account in Microsoft Azure. All users has the same tenantID.

We have connected one of the accounts to Microsoft Graph API so order made on their website can be send via their email address.

Now, we're trying to connected another account to the service. We have set up the account settings in the same way as the previous and added all the relevant keys to our C# code but the emails do not being send, and I can't understand why.

The first account's emails do send correctly, only the second one is unsuccessfull. The response is Status: WaitingForActivation, but it is so also in the first accound so I'm gussing thats not the problem.

Any advice will help, thank you very much!