Hello,
I've seen multiple occurences in the Azure signin logs where user.name was not populated. Those documents always have an error.message containing "field [message] already exists".
This seem like a bug.. The message field in those documents apparently has the same value as the filed azure.signinlogs.result_description, for example "Users' needs to enroll for second factor authentication (interactive)."
Sounds like a bug in the pipeline to me, ok if I make a GH issue?
Best regards,
Willem