Nuance incident
Error Code: SerializationFailure Details: Unexpected token
Nuance experienced a notice incident on July 15, 2026 affecting DAX Copilot for Epic - Audio Recording (US-01), lasting 2h 30m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jul 15, 2026, 12:57 PM UTC
Microsoft is investigating the above error reported.
- identified Jul 15, 2026, 01:18 PM UTC
Microsoft has identified the above reported error and working on remediation.
- identified Jul 15, 2026, 01:39 PM UTC
Microsoft is investigating an issue affecting Dragon and DAX Copilot for EPIC ambient users on Epic Nebula. DAX/Dragon Copilot launch in Epic Haiku was failing with the following message: An error was encountered while communicating with the server. Seek assistance from an administrator if the problem persists. Code: SerializationFailure Details: Unexpected token. Impact is specifically attributed to: Ambient users on Epic Nebula. Remediation actions have been taken and improved performance has been observed. Microsoft is closely monitoring and will update the status accordingly. Thank you for your patience and continued partnership.
- monitoring Jul 15, 2026, 02:26 PM UTC
Microsoft has remediated an issue affecting Dragon and DAX Copilot for EPIC ambient users on Epic Nebula. DAX/Dragon Copilot launch in Epic Haiku was failing with the following message: An error was encountered while communicating with the server. Seek assistance from an administrator if the problem persists. Code: SerializationFailure Details: Unexpected token. Impact is specifically attributed to: Ambient users on Epic Nebula. Thank you for your patience and continued partnership.
- resolved Jul 15, 2026, 03:27 PM UTC
This incident has been resolved.