group claims upper case by default

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I'm using dex connector to control oidc flow between argocd and an idp. when it returns the groups claims, the groups are all converted to upper case. I would like to preserve the case but not sure where this is done in the code or if it can be disabled through configuration file. Anyone any ideas?

[sagikazarmark]

It's highly unlikely Dex itself converts the group names to upper case.

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Yes you are right. Thank you! The idp was configured to convert groups to upper case. I had initially ruled idp out based on misinformation.