$components.CheckFieldUniqueness appears to be case sensitive, but UserPrincipalName in AD is case insensitive.
In my solution I am doing a check to ensure my UserPrincipalName field value is unique and $components.CheckFieldUniqueness tells me it is, but my update to AD fails because there that value is already present with different case.
i.e. "email@example.com" vs "Tom@contoso.com"
How can I perform a case insensitive unique value check?
Customer support service by UserEcho