Since end December 2025, Add User -> Invite External User: Microsoft Entra ID fails to send Invite to External users and CC.

Question

Since end December 2025, Add User -> Invite External User: Microsoft Entra ID fails to send Invite to External users and CC.

Adrian Wreyford 80

Login to Azure, then go to Entra ID. Add user -> Invite External user.
Then since Dec 2025, when inviting new guest users, they are NOT receiving Invite Emails, nor are we receiving the CC when entering our email there.

I added myself with my personal email this morning, and another email for CC, and did not receive the cc, or the invite.

We are thus unable to invite new users to use our portal for our customers.

We have to resort to re-inviting a 'pending accepted' user, then copy the link, and send the link manually. This is very unprofessional, and has been working for years, but suddenly stopped working Dec for our subscription.

Adrian Wreyford 80 Reputation points

2026-01-24T08:09:33.0666667+00:00

I checked all AI suggestions and all settings correct.
Please note that we have been inviting users for quite a few years, and only since Dec 2025 have we been experiencing this issue. Thus something is broken.
Jacek Mokrzycki 0 Reputation points

2026-01-28T12:14:57.13+00:00

We've observed the same thing - we're using an External ID tenant and last year invitations worked correctly. Interestingly, another tenant that we own, sent an invitation to an external user without problems on January 13th
Adrian Wreyford 80 Reputation points

2026-02-11T13:38:38.0266667+00:00

We are still unable 2026-02-11 to get any invites sent. We follow the process as we have always done, but since end of December, the invites are not sent as outlined above.
We appear to have no recourse with MS, in spite of paying for the Azure service.
Is it possible for an Engineer to look into this PLEASE, as we can assure you that it is broken!
EntraID is not sending invites to external users, nor sending to the CC email. We have to copy the links and send manually to onboard the end users. VERY FRUSTRATING.
VEMULA SRISAI 13,985 Reputation points Microsoft External Staff Moderator

2026-02-18T03:13:59.87+00:00

Adrian Wreyford We’re seeing the same behavior across multiple tenants since late December 2025. The guest user object is created successfully and remains in Pending acceptance, but the invitation email (including CC) is not delivered. This indicates the invite workflow completes, but email delivery from Microsoft is failing, not the invitation itself.

As a workaround, Microsoft supports redeeming guest access via a direct invitation link. The recommended approach is to create the guest invitation without sending Microsoft’s email and instead send the redemption URL from your own mail domain, which avoids current deliverability issues

https://learn.microsoft.com/en-us/entra/external-id/redemption-experience
Thennarasu D 0 Reputation points

2026-02-25T10:44:01.56+00:00

As on Feb 25, we are still facing issues while inviting users, can Microsoft recommend the solution to fix this asap.
Adrian Wreyford 80 Reputation points

2026-03-03T05:11:52.44+00:00

Still no response from Microsoft. How do we get pressing issues - bugs resolved if no body from Microsoft responds. Please can somebody attend to this.
David Kesselheim 0 Reputation points

2026-04-08T07:10:05.7666667+00:00

We are seeing the same issue.
Jshot 15 Reputation points

2026-04-28T15:13:17.9466667+00:00

Same issue here

1 answer

Your answer

Adrian Wreyford 80 Reputation points

2026-01-24T08:09:33.0666667+00:00

I checked all AI suggestions and all settings correct.
Please note that we have been inviting users for quite a few years, and only since Dec 2025 have we been experiencing this issue. Thus something is broken.
Jacek Mokrzycki 0 Reputation points

2026-01-28T12:14:57.13+00:00

We've observed the same thing - we're using an External ID tenant and last year invitations worked correctly. Interestingly, another tenant that we own, sent an invitation to an external user without problems on January 13th
Adrian Wreyford 80 Reputation points

2026-02-11T13:38:38.0266667+00:00

We are still unable 2026-02-11 to get any invites sent. We follow the process as we have always done, but since end of December, the invites are not sent as outlined above.
We appear to have no recourse with MS, in spite of paying for the Azure service.
Is it possible for an Engineer to look into this PLEASE, as we can assure you that it is broken!
EntraID is not sending invites to external users, nor sending to the CC email. We have to copy the links and send manually to onboard the end users. VERY FRUSTRATING.
VEMULA SRISAI 13,985 Reputation points Microsoft External Staff Moderator

2026-02-18T03:13:59.87+00:00

Adrian Wreyford We’re seeing the same behavior across multiple tenants since late December 2025. The guest user object is created successfully and remains in Pending acceptance, but the invitation email (including CC) is not delivered. This indicates the invite workflow completes, but email delivery from Microsoft is failing, not the invitation itself.

As a workaround, Microsoft supports redeeming guest access via a direct invitation link. The recommended approach is to create the guest invitation without sending Microsoft’s email and instead send the redemption URL from your own mail domain, which avoids current deliverability issues

https://learn.microsoft.com/en-us/entra/external-id/redemption-experience
Thennarasu D 0 Reputation points

2026-02-25T10:44:01.56+00:00

As on Feb 25, we are still facing issues while inviting users, can Microsoft recommend the solution to fix this asap.
Adrian Wreyford 80 Reputation points

2026-03-03T05:11:52.44+00:00

Still no response from Microsoft. How do we get pressing issues - bugs resolved if no body from Microsoft responds. Please can somebody attend to this.
David Kesselheim 0 Reputation points

2026-04-08T07:10:05.7666667+00:00

We are seeing the same issue.
Jshot 15 Reputation points

2026-04-28T15:13:17.9466667+00:00

Same issue here

Answer 1

It seems you are experiencing issues with inviting external users through Microsoft Entra ID, particularly with the invite emails not being sent. Here are a few troubleshooting steps and considerations:

Check External Collaboration Settings: Ensure that your organization's external collaboration settings are properly configured to allow inviting external users. You can verify this in the Azure portal under Microsoft Entra ID > Users > User settings > External users.
Permissions: Make sure that your account has the necessary permissions to invite external users. You should be a member of the Project Collection Administrators group or have similar permissions.
Email Delivery Issues: Sometimes, invite emails may end up in spam or junk folders. Ensure that the email addresses you are using are correct and check those folders.
Review Policies: Check if there are any policies that might be blocking the invitations. For instance, if the external guest access is turned off, you will not be able to invite new users.
Delay in Changes: If you have recently modified any settings related to external collaboration, there may be a delay (15-60 minutes) before the changes take effect.
Cross-Tenant Access Settings: If you see messages indicating that invitations are blocked due to cross-tenant access settings, consult your administrator to review and adjust these settings.

If the problem persists, you may want to reach out to Microsoft support for further assistance, as there could be specific issues related to your subscription or tenant settings that need to be addressed.

References: