@Kevin Overmars , Thank you for sharing the details. I checked the .har file and I see that it only has an Id_token in it. The issued id_token is of type v2.0 as I believe when the request was made to get the token to the token endpoint was made to the v2.0 token endpoint i.e https://login.microsoftonline.com/<tenant-id>/oauth2/v2.0/token
If you make a request to v2.0 endpoint of AAD while using the OpenIDConnect or OAuth, the Id-Token that gets issued would be a v2.0 token. The properties that you are looking for i.e "name" and "oid" would be available in a v1.0 Id-Token.
You can check and decode the following two Id-Tokens using the tool JWT.ms to understand the difference:
V1.0 Id-Token:
eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6IjdfWnVmMXR2a3dMeFlhSFMzcTZsVWpVWUlHdyIsImtpZCI6IjdfWnVmMXR2a3dMeFlhSFMzcTZsVWpVWUlHdyJ9.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.UJQrCA6qn2bXq57qzGX_-D3HcPHqBMOKDPx4su1yKRLNErVD8xkxJLNLVRdASHqEcpyDctbdHccu6DPpkq5f0ibcaQFhejQNcABidJCTz0Bb2AbdUCTqAzdt9pdgQvMBnVH1xk3SCM6d4BbT4BkLLj10ZLasX7vRknaSjE_C5DI7Fg4WrZPwOhII1dB0HEZ_qpNaYXEiy-o94UJ94zCr07GgrqMsfYQqFR7kn-mn68AjvLcgwSfZvyR_yIK75S_K37vC3QryQ7cNoafDe9upql_6pB2ybMVlgWPs_DmbJ8g0om-sPlwyn74Cc1tW3ze-Xptw_2uVdPgWyqfuWAfq6Q
V2.0 Id-Token:
eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjFMVE16YWtpaGlSbGFfOHoyQkVKVlhlV01xbyJ9.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.1AFWW-Ck5nROwSlltm7GzZvDwUkqvhSQpm55TQsmVo9Y59cLhRXpvB8n-55HCr9Z6G_31_UbeUkoz612I2j_Sm9FFShSDDjoaLQr54CreGIJvjtmS3EkK9a7SJBbcpL1MpUtlfygow39tFjY7EVNW9plWUvRrTgVk7lYLprvfzw-CIqw3gHC-T7IK_m_xkr08INERBtaecwhTeN4chPC4W3jdmw_lIxzC48YoQ0dB1L9-ImX98Egypfrlbm0IBL5spFzL6JDZIRRJOu8vecJvj1mq-IUhGt0MacxX8jdxYLP-KUu2d9MbNKpCKJuZ7p8gwTL5B7NlUdh_dmSviPWrw
More details can be found here: https://learn.microsoft.com/en-us/azure/active-directory/develop/id-tokens
Also, would like to state that this Id_Token is not the same as the Access_Token. The Id-Token is just used to prove that the user is authenticated by a reliable source like AAD, whereas an Access-Token is used to make the actual APIs calls for the resources that are protected by AAD. The Access-Tokens mostly contains the permissions that the user/application, trying to call/access the AAD Protected resource mentioned while getting itself authenticated to AAD and fetching the token.
Summary:
For getting the properties like "name" and "oid" in the Id-Token, you need to make a call to the token-endpoint using the Auth-Code Grant flow of OAuth or OpenIDConnect protocol to the AAD's v1.0 endpoint in order to receive a v1.0 id-token.
Hope this helps.
Do let us know if this helps and if there are any more queries around this, please do let us know so that we can help you further. Also, please do not forget to accept the response as Answer; if the above response helped in answering your query.