Hi @Leandro Lima ,
There is a known limitation. Google Workspace does not support non-ASCII characters, and Azure does not support replacing/transforming the data inside claims from non-ASCII to ASCII as it is a standard requirement to include non-ASCII characters.
I've reported this issue to both the Google and Azure teams, and they are aware of it. There is no ETA for a fix yet, though. The issue is because Google does not accept non-ascii characters in fields such as display name last name.
The best recommendation is to omit these types of attributes and rely on UPN/e-mail address. Our issued tokens will contain the users' names as stored in AAD - so if they have non-ASCII characters, we will include those.
See related issues:
https://github.com/MicrosoftDocs/azure-docs/issues/84432
https://learn.microsoft.com/en-us/answers/questions/50242/g-suite-sso.html
I also recommend creating a request with Google to drive this improvement. https://support.google.com/a/answer/6284762?hl=en
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