Entra External ID: email one-time passcodes no longer delivered for any user (tenant-wide), including "Run user flow"

Problem: In our Microsoft Entra External ID (external) tenant, no email one-time passcode is delivered any more. Users see that a code was sent, but no email arrives. This affects every address we tried (a Microsoft 365 work address, Hotmail, Gmail) and every network (office, home, mobile data), and nothing is in junk or quarantine.

Tenant: mekconnectinvest.onmicrosoft.com, tenant ID c30d2554-560b-462a-adf5-9792578c67ae. It's linked to an Azure subscription (MAU billing, provisioning succeeded).

Timeline (CET, 12 Nov 2026):

• Codes arrived normally until 14:13. That was the last code received, sent by [******@accountprotection.microsoft.com].
• Sign-ins between 14:13 and 18:21 succeeded by reusing an existing session, without a code.
• Since signing out (after 18:21), no code has arrived.

What we checked:

• User flow "SignUpSignIn": sign-up and sign-in, identity provider Email One Time Passcode, our application attached. Unchanged.
• Custom authentication extensions: none, so no custom email OTP provider.
• Audit logs: no configuration change in the tenant today, only reads.
• Sign-in logs: the attempts waiting for a code leave no entry. The last successful entries are at 14:13, request IDs 0a7a2ba5-… and c7df14e6-…
• "Run user flow" from the admin center: also sends no code. So it's not related to our application.
• Service Health: no events shown.

Question: Is email OTP sending throttled, blocked or failing for this tenant, and how can it be restored? We have no paid support plan, so we can't open a technical case. Problem: In our Microsoft Entra External ID (external) tenant, no email one-time passcode is delivered any more. Users see that a code was sent, but no email arrives. This affects every address we tried (a Microsoft 365 work address, Hotmail, Gmail) and every network (office, home, mobile data), and nothing is in junk or quarantine.

Tenant: mekconnectinvest.onmicrosoft.com, tenant ID c30d2554-560b-462a-adf5-9792578c67ae. It's linked to an Azure subscription (MAU billing, provisioning succeeded).

Timeline (CET, 12 Nov 2026):

• Codes arrived normally until 14:13. That was the last code received, sent by [******@accountprotection.microsoft.com].
• Sign-ins between 14:13 and 18:21 succeeded by reusing an existing session, without a code.
• Since signing out (after 18:21), no code has arrived.

What we checked:

• User flow "SignUpSignIn": sign-up and sign-in, identity provider Email One Time Passcode, our application attached. Unchanged.
• Custom authentication extensions: none, so no custom email OTP provider.
• Audit logs: no configuration change in the tenant today, only reads.
• Sign-in logs: the attempts waiting for a code leave no entry. The last successful entries are at 14:13, request IDs Problem: In our Microsoft Entra External ID (external) tenant, no email one-time passcode is delivered any more. Users see that a code was sent, but no email arrives. This affects every address we tried (a Microsoft 365 work address, Hotmail, Gmail) and every network (office, home, mobile data), and nothing is in junk or quarantine.

Tenant: mekconnectinvest.onmicrosoft.com, tenant ID c30d2554-560b-462a-adf5-9792578c67ae. It's linked to an Azure subscription (MAU billing, provisioning succeeded).

Timeline (CET, 12 Nov 2026):

• Codes arrived normally until 14:13. That was the last code received, sent by [******@accountprotection.microsoft.com]. Sign-ins between 14:13 and 18:21 succeeded by reusing an existing session, without a code. Since signing out (after 18:21), no code has arrived. What we checked:

  **User flow "SignUpSignIn":** sign-up and sign-in, identity provider Email One Time Passcode, our application attached. Unchanged.
     **Custom authentication extensions:** none, so no custom email OTP provider.
        **Audit logs:** no configuration change in the tenant today, only reads.
           **Sign-in logs:** the attempts waiting for a code leave no entry. The last successful entries are at 14:13, request IDs 0a7a2ba5-… and c7df14e6-…
              **"Run user flow" from the admin center:** also sends no code. So it's not related to our application.
                 **Service Health:** no events shown.
```**Question:** Is email OTP sending throttled, blocked or failing for this tenant, and how can it be restored? We have no paid support plan, so we can't open a technical case.

**Problem:** In our Microsoft Entra External ID (external) tenant, no email one-time passcode is delivered any more. Users see that a code was sent, but no email arrives. This affects every address we tried (a Microsoft 365 work address, Hotmail, Gmail) and every network (office, home, mobile data), and nothing is in junk or quarantine.

**Tenant:** mekconnectinvest.onmicrosoft.com, tenant ID c30d2554-560b-462a-adf5-9792578c67ae. It's linked to an Azure subscription (MAU billing, provisioning succeeded).

**Timeline (CET, 12 Nov 2026):**

- Codes arrived normally until 14:13. That was the last code received, sent by [******@accountprotection.microsoft.com].

- Sign-ins between 14:13 and 18:21 succeeded by reusing an existing session, without a code.

- Since signing out (after 18:21), no code has arrived.

**What we checked:**

- **User flow "SignUpSignIn":** sign-up and sign-in, identity provider Email One Time Passcode, our application attached. Unchanged.

- **Custom authentication extensions:** none, so no custom email OTP provider.

- **Audit logs:** no configuration change in the tenant today, only reads.

- **Sign-in logs:** the attempts waiting for a code leave no entry. The last successful entries are at 14:13, request IDs **Problem:** In our Microsoft Entra External ID (external) tenant, no email one-time passcode is delivered any more. Users see that a code was sent, but no email arrives. This affects every address we tried (a Microsoft 365 work address, Hotmail, Gmail) and every network (office, home, mobile data), and nothing is in junk or quarantine.

  **Tenant:** mekconnectinvest.onmicrosoft.com, tenant ID c30d2554-560b-462a-adf5-9792578c67ae. It's linked to an Azure subscription (MAU billing, provisioning succeeded).
  
  **Timeline (CET, 12 Nov 2026):**
  
     - Codes arrived normally until 14:13. That was the last code received, sent by [******@accountprotection.microsoft.com].
     
        - Sign-ins between 14:13 and 18:21 succeeded by reusing an existing session, without a code.
        
           - Since signing out (after 18:21), no code has arrived.
           
  **What we checked:**
  
     - **User flow "SignUpSignIn":** sign-up and sign-in, identity provider Email One Time Passcode, our application attached. Unchanged.
     
        - **Custom authentication extensions:** none, so no custom email OTP provider.
        
           - **Audit logs:** no configuration change in the tenant today, only reads.
           
              - **Sign-in logs:** the attempts waiting for a code leave no entry. The last successful entries are at 14:13, request IDs 0a7a2ba5-… and c7df14e6-…
              
                 - **"Run user flow" from the admin center:** also sends no code. So it's not related to our application.
                 
                    - **Service Health:** no events shown.
                    
  **Question:** Is email OTP sending throttled, blocked or failing for this tenant, and how can it be restored? We have no paid support plan, so we can't open a technical case.
  
  **Problem:** In our Microsoft Entra External ID (external) tenant, no email one-time passcode is delivered any more. Users see that a code was sent, but no email arrives. This affects every address we tried (a Microsoft 365 work address, Hotmail, Gmail) and every network (office, home, mobile data), and nothing is in junk or quarantine.
  
  **Tenant:** mekconnectinvest.onmicrosoft.com, tenant ID c30d2554-560b-462a-adf5-9792578c67ae. It's linked to an Azure subscription (MAU billing, provisioning succeeded).
  
  **Timeline (CET, 12 Nov 2026):**
  
  - Codes arrived normally until 14:13. That was the last code received, sent by [******@accountprotection.microsoft.com].
  
  - Sign-ins between 14:13 and 18:21 succeeded by reusing an existing session, without a code.
  
  - Since signing out (after 18:21), no code has arrived.
  
**What we checked:**

- **User flow "SignUpSignIn":** sign-up and sign-in, identity provider Email One Time Passcode, our application attached. Unchanged.

- **Custom authentication extensions:** none, so no custom email OTP provider.

- **Audit logs:** no configuration change in the tenant today, only reads.

- **Sign-in logs:** the attempts waiting for a code leave no entry. The last successful entries are at 14:13, request IDs c7df14e6-f106-4dfd-9390-ea60b31d0d00 and 0a7a2ba5-a474-4793-9007-1ab45b900d00

- **"Run user flow" from the admin center:** also sends no code. So it's not related to our application.

- **Service Health:** no events shown.

**Question:** Is email OTP sending throttled, blocked or failing for this tenant, and how can it be restored? We have no paid support plan, so we can't open a technical case.

 and c7df14e6-…

- **"Run user flow" from the admin center:** also sends no code. So it's not related to our application.

- **Service Health:** no events shown.

**Question:** Is email OTP sending throttled, blocked or failing for this tenant, and how can it be restored? We have no paid support plan, so we can't open a technical case.

-  and c7df14e6-…

- **"Run user flow" from the admin center:** also sends no code. So it's not related to our application.

- **Service Health:** no events shown.

**Question:** Is email OTP sending throttled, blocked or failing for this tenant, and how can it be restored? We have no paid support plan, so we can't open a technical case.