power bi user can not be invited as external user cause of inval email

Since you wrote this thread in English, I’ll reply in English as well. Please let me know if you’d prefer to switch to another language, and I’ll do my best to support you.

Hello @SearchingForSupportRegardingPowerBI_issues

Welcome to Q&A forum!

I understand it can be very confusing when everything seems correct on your side, yet the invitation still fails. This issue often involves multiple factors in the client tenant’s settings, which makes it hard to identify the root cause immediately. However, I’ll try to clarify this issue to help you move foward.

First, regarding your concern:

The presence of “gmail” in your tenant's name is not the root cause. Microsoft does not block tenants based on the string in their name (e.g., gmail.onmicrosoft.com). So, this is unlikely to be the issue.

In this case, you’ve already done the right checks, so the problem is possibly related to the other tenant’s configuration. Even if your account and domain are valid, external invitations in Power BI often fail because of settings on the inviting tenant, not because of your tenant's name. Power BI sharing depends on multiple layers of configuration, such as:

• External collaboration restrictions (their Azure AD settings may disallow guests from certain domains).
• Power BI sharing settings (they may not have enabled sharing with external users).
• Conditional Access policies (their security rules might block sign-ins from your tenant).
• Licensing mismatch (Power BI Pro or Premium Per User is required for sharing).

I suggest that you can provide this checklist for the external client’s admin:

1/ Verify External Collaboration Settings

Sign in to the Microsoft Entra admin center.

Browse to Entra ID > External Identities > External collaboration settings.

• Guest users are allowed.
• Your domain is not blocked.

For your reference: Configure external collaboration - Microsoft Entra External ID | Microsoft Learn

2/ Enable External Sharing in Power BI

Power BI has its own setting for sharing with external users. Even if guest access is allowed in Microsoft Entra Admin Center, this must be enabled separately.

For your reference:

Export and sharing tenant settings - Microsoft Fabric | Microsoft Learn

Distribute Power BI Content to External Guest Users with Microsoft Entra B2B - Microsoft Fabric | M…

3/ Review Conditional Access Policies

Ensure no policy blocks sign-ins from your tenant or requires unsupported MFA.

For your reference:

Microsoft Entra Conditional Access: Zero Trust Policy Engine - Microsoft Entra ID | Microsoft Learn

Admins with at least the Security Reader role can find Conditional Access in the Microsoft Entra admin center under Entra ID > Conditional Access.

4/ Confirm Licensing

Both sides need Power BI Pro or Premium Per User licenses for sharing. Without this, the invite cannot succeed.

Distribute Power BI Content to External Guest Users with Microsoft Entra B2B - Microsoft Fabric | Microsoft Learn

Once again, because this depends on the configuration of both tenants and the issue is quite complex, if this affects collaboration and work between the two organizations, your client’s global admin can raise a support ticket directly with Microsoft Support Engineering. They can check this issue for them directly via a phone call. Here is the detailed guidance to reach out to them:

• Sign into the "Microsoft Admin Center"
• After clicking on "Help & Support" button like this image, you can type "I need help". After that, you can click on "Contact support"
• Choose contact method: "Phone"
• Fill all the information in this contact support details, please describe your situation carefully so they will have enough information to help you.
• Finally, clicking on "Contact me"

Hope everything goes smoothly and you have great success in your work.

Please let me know if I can do anything more for you!

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