On March 26, 2025, at 19:04 UTC, some customers in us4: Anaplan Amazon Cloud - Dedicated were unable to access the platform. This was due to a site error that occurred after people entered their email addresses. This impacted basic and single sign-on (SSO) pre-login pages.
Our investigation determined that a configuration change had been rolled out as part of a release earlier that day. The release was aborted; however, the configuration update had not been reverted as expected.
Our teams then performed a comprehensive rollback and completed a rolling restart of the impacted service. This restored stability, and the incident was fully resolved by 20:15 UTC.
To prevent similar issues like this from happening in the future, we’ve initiated a detailed evaluation of our existing testing procedures. We’ve also reviewed our rollback process. We are in the process of creating detailed documentation to ensure all the necessary rollback steps are carried out for aborted changes with configuration updates.
We apologize for any impact this might have had on your business operations. We’re continuously strengthening our systems and procedures to ensure we avoid future disruption to your business and users.
If you have further questions or concerns, please visit Anaplan Support website. Thank you for your patience during this situation and thank you for being an Anaplan customer.