Some users may not receive One-Time Passcode (OTP) email messages for encrypted messages in Exchange Online

Title: Some users may not receive One-Time Passcode (OTP) email messages for encrypted messages in Exchange Online

User impact: Users may not receive OTP email messages for encrypted messages in Exchange Online

More info: Impact only occurs for users that have a process configured to perform a Domain Name System (DNS) check on incoming email messages.

Current status: We've corrected the DNS record configurations for the affected domain and are reaching out to a sample of affected users to confirm whether the impact is remediated.

Scope of impact: Some users expecting to receive OTP email messages for encrypted email messages in Exchange Online may be impacted.

Start time: Thursday, June 26, 2025, at 2:31 PM UTC

Root cause: DNS records for the domain that provides OTP email messages to encrypted messages became misconfigured, which is causing impact.

Next update by: Wednesday, July 2, 2025, at 7:00 PM UTC

Title: Some users may not receive One-Time Passcode (OTP) email messages for encrypted messages in Exchange Online

User impact: Users may not receive OTP email messages for encrypted messages in Exchange Online.

More info: Impact only occurs for users that have a process configured to perform a Domain Name System (DNS) check on incoming email messages.

Current status: We've confirmed that the DNS records for the domain that provides OTP email messages to encrypted messages became misconfigured, which is causing impact. We're correcting the DNS record configurations for the domain to remediate the impact.

Scope of impact: Some users expecting to receive OTP email messages for encrypted email messages in Exchange Online may be impacted.

Start time: Thursday, June 26, 2025, at 2:31 PM UTC

Root cause: DNS records for the domain that provides OTP email messages to encrypted messages became misconfigured, which is causing impact.

Next update by: Tuesday, July 1, 2025, at 11:30 PM UTC

Title: Some users may not receive One-Time Passcode (OTP) email messages for encrypted messages in Exchange Online

User impact: Users may not receive OTP email messages for encrypted messages in Exchange Online.

Current status: Our review of the DNS records for the domain that provides access codes to encrypted messages suggests that the domain has been removed. We're continuing to confirm this while we consider possible mitigation options to restore the email messages.

Scope of impact: Some users expecting to receive OTP email messages for encrypted email messages in Exchange Online may be impacted.

Next update by: Tuesday, July 1, 2025, at 10:30 PM UTC

Title: Some users may not receive One-Time Passcode (OTP) email messages for encrypted messages in Exchange Online

User impact: Users may not receive OTP email messages for encrypted messages in Exchange Online.

Current status: We're continuing to review the DNS records to verify whether any are missing, so that we can determine the necessary mitigation strategy.

Scope of impact: Some users expecting to receive OTP email messages for encrypted email messages in Exchange Online may be impacted.

Next update by: Tuesday, July 1, 2025, at 8:30 PM UTC

Title: Some users may not receive One-Time Passcode (OTP) email messages for encrypted messages in Exchange Online

User impact: Users may not receive OTP email messages for encrypted messages in Exchange Online.

Current status: We're reviewing the Domain Name System (DNS) records for the domain that provide access codes to encrypted messages to confirm whether they are accurate or contributing to the impact.

Scope of impact: Some users expecting to receive OTP email messages for encrypted email messages in Exchange Online may be impacted.

Next update by: Tuesday, July 1, 2025, at 6:30 PM UTC

Title: Some users may not receive One-Time Passcode (OTP) email messages for encrypted messages in Exchange Online

User impact: Users may not receive OTP email messages for encrypted messages in Exchange Online.

Current status: We're investigating a potential issue with Exchange Online and checking for impact to your organization. We'll provide an update within 30 minutes.