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Delivery Failed error when inviting a specific user to a Teams Meeting

Anonymous
2021-05-05T10:08:45+00:00

Hello, 

We arranged a meeting through MS Teams, and upon inviting the members only a specific user sends back the following error:

Delivery has failed to these recipients or groups:

p*****@*****.com
Your message wasn't delivered because the recipient's email provider rejected it

Diagnostic information for administrators:

Generating server: DB8PR10MB2970.EURPRD10.PROD.OUTLOOK.COM

p*****@*****.com

Remote Server returned '550 5.7.520 Access denied, Your organization does not allow external forwarding. Please contact your administrator for further assistance. AS(7555)'

Received: from DB8PR10MB3910.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:10:14a::22)

 by DB8PR10MB2970.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:10:e5::20) with

 Microsoft SMTP Server (version=TLS1_2,

 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id *******; Wed, 5 May

 2021 08:31:24 +0000

Received: from DB8PR10MB3910.EURPRD10.PROD.OUTLOOK.COM

 ([fe80::b8f3:e04c:a71:cc85]) by DB8PR10MB3910.EURPRD10.PROD.OUTLOOK.COM

 ([fe80::b8f3:e04c:a71:cc85%4]) with mapi id ********; Wed, 5 May 2021

 08:31:24 +0000

All user mailboxes are configured the same way. How can we fix this?

Many Thanks

Microsoft Teams | Microsoft Teams for business | Meetings and calls | Schedule meetings

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  1. Anonymous
    2021-07-12T15:46:44+00:00

    how do I fix this

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  2. Anonymous
    2021-05-05T10:40:39+00:00

    Hi

    My name is Daniel. I am an Independent Advisor.

    You need to reach out to your admins because auto-forwarding has been blocked by default. Please ask your admin to refer to the following articles below:

    Please ask your admin to read this the documentation regarding how to control automatic external email forwarding: https://docs.microsoft.com/en-us/microsoft-365/...

    Please ask your admin to read this article about how to fix this issue:

    https://docs.microsoft.com/en-us/answers/questi...

    https://docs.microsoft.com/en-us/exchange/mail-...

    Disclaimer:

    This is a peer-to-peer support forum. I'm an Independent Advisor & fellow MS forum users just like you, who are trying to help other users with their issues. I'm Non-Microsoft Staff.

    Kind Regards

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