Halifax

The affected services remain stable. Blackboard continues to monitor the underlying services to ensure ongoing stability. The next update will be provided by close of business.

Title: Users may be unable to sign in to OneNote using iOS devices User impact: Users may be unable to sign in to OneNote using iOS devices. More info: Impact is specific to users with OneNote build 16.112.717.0 or higher. Whilst we work on remediation, impacted users may be able to utilize OneNote on the web or remove Authenticator so that authentication falls back to the in-app webview. Users may also be able to sign in to any other Microsoft 365 apps first (e.g. PowerPoint), then attempt to sign in again in OneNote. Current status: Our fix deployment is taking longer than anticipated but is ongoing. We're continuing to monitor as it progresses to establish a completion timeline. Scope of impact: Any user attempting to sign in to OneNote build 16.112.717.0 or higher using iOS devices is impacted. Start time: Monday, July 20, 2026, at 4:36 AM UTC Root cause: A code change included in OneNote builds 16.112.717.0 and above, designed to change how authentication requests are routed, introduced an issue with OneNote iOS Authenticator broker sign-in and is causing impact. Next update by: Friday, August 21, 2026, at 4:00 AM UTC

The issue has been identified and a fix is being implemented.

We're continuing our restoration efforts regarding this issue affecting a subset of channels with custom message retention settings. While we work to resolve this issue, data retention processing remains paused for affected customers. We will provide another update as additional information becomes available.