Outage in Dragon (US)
Error Code: SerializationFailure Details: Unexpected token
Resolved MinorIncident Report
Summary AI Generated
DAX/Dragon Copilot failed to launch in Epic Haiku for ambient users on Epic Nebula, displaying a SerializationFailure error when attempting to communicate with the server. The issue affected the DAX Copilot for Epic audio recording component and lasted approximately 2.5 hours. Microsoft identified and remediated the issue, with the incident fully resolved by 11:27 AM ET on July 15, 2026.
Microsoft is investigating the above error reported.
Components affected
Dragon (US) DAX Copilot for Epic - Audio RecordingTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
19 days ago - at 07/15/2026 03:27PM
This incident has been resolved.
MONITORING
19 days ago - at 07/15/2026 02:26PM
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.
IDENTIFIED
19 days ago - at 07/15/2026 01:39PM
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.
IDENTIFIED
19 days ago - at 07/15/2026 01:18PM
Microsoft has identified the above reported error and working on remediation.
INVESTIGATING
19 days ago - at 07/15/2026 12:57PM
Microsoft is investigating the above error reported.
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