Getting "MailboxNotEnabledForRESTAPI" while trying to use MS Graph API on Postman

João Pimentel 6 Reputation points

I'm a beginner with MS Graph,
After a few days trying to use MS Graph API on Postman, following this guide
At first I got "OrganizationFromTenantGuidNotFound" when trying to call "" or the events endpoint

So yesterday I started to get

And I didn't changed a thing, so I'm unsure of what I'm doing wrong
I can access some endpoints, like "" and "", but I need to call the events endpoint
Besides, I can make all the calls normally with MS Graph Explorer and using MS Graph Explorer token on postman too

I would be very grateful if someone could point me to the right direction.

Microsoft Graph
Microsoft Graph
A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
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  1. Vasil Michev 100.1K Reputation points MVP

    What kind of account do you have, are you using OrgID or MSA, do you have a mailbox enabled for said account and where is the mailbox located? Also are you saying that the call works on Graph explorer but not on Postman?

  2. João Pimentel 6 Reputation points

    I have the following permissions with admin consent on my azure portal


    I shouldn't get events results, but I think it should be enough to get mails on delegated request
    Also, when I copy Graph explorer token and paste on postman, it works fine

  3. João Pimentel 6 Reputation points

    I don't know which information about the token I can post here or not, but I believe that these are the scope infos that came with my token, so it appears to be right

    "scp": "Mail.Read Mail.ReadBasic User.Read profile openid email"

    I tried also, to check MS Graph explorer token on this both and, but in any of then, they decodified any info