Outage in Episerver

Optimizely Data Platform - Identity resolution - EMEA

Resolved Major
November 07, 2025 - Started about 1 month ago - Lasted 14 days
Official incident page

Incident Report

We are investigating the problem with identity resolution in EMEA.

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Latest Updates ( sorted recent to last )
RESOLVED 17 days ago - at 11/21/2025 04:46PM

We have finished the large majority of the planned data operations, all duplicates that were created as a part of the incident were removed and all campaign activity returned to normal. Over the coming weeks, we will be prioritising low-impact data clean-up operations.

IDENTIFIED 19 days ago - at 11/19/2025 09:28AM

We expect to complete the data repair operations by Friday, 21 November, in the evening (CET).

IDENTIFIED 22 days ago - at 11/16/2025 02:52PM

We anticipate commencing data repair operations on Monday evening (CET). Once we begin, we can provide an estimated completion timeline.

IDENTIFIED 24 days ago - at 11/13/2025 10:13PM

We are working on a solution to resolve the remaining data inconsistencies. An estimated completion time will be provided in due course.

IDENTIFIED 25 days ago - at 11/12/2025 10:12PM

We have identified all the variations of potential inconsistencies and now working on a solution to resolve them.

IDENTIFIED 27 days ago - at 11/11/2025 08:23AM

We're still analysing the affected dataset to identify potential inconsistencies and develop a plan for resolving them.

IDENTIFIED 30 days ago - at 11/08/2025 08:39AM

We have successfully recovered identity data for profiles that were seen before the incident. This recovery enables working with the original profiles instead of profile duplicates that may have been created during the incident. We will continue to examine the data to identify potential inconsistencies and develop a plan for resolving them.

IDENTIFIED about 1 month ago - at 11/08/2025 02:04AM

We are continuing to work with our vendor to test a potential solution for one of the underlying data storage systems.

IDENTIFIED about 1 month ago - at 11/07/2025 09:34PM

Customers may experience the creation of duplicate profiles with new identities for those who have been previously seen. We are collaborating with our vendor to identify and test a potential solution for one of the underlying data storage systems.

INVESTIGATING about 1 month ago - at 11/07/2025 06:36PM

We are investigating the problem with identity resolution in EMEA.

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