Oauth token refresh problem with a proxy

[rik-lv]

Hello everyone,
I have an issue with Notes client 12.0.2 (mail template 12.0.2) and online teams integration.
We are using a proxy, set the env variables (https_proxy=....) but the refresh of the token seems to fail due to the proxy.
If we remove it and then connect directly to the Internet, it works.
We are in a process of changing our proxy, so we have tried two proxies (no authentication) and it fails with both.
Did someone make it work with a proxy ?
Thank you
Extract of the console.log
[0994:0002-1A54] LSXBE HTTP debug information type: HTTP Response header:
[0994:0002-1A54] request-id: 549b1e30-b717-498f-939b-2c7ed386f823
[0994:0002-1A54] LSXBE HTTP debug information type: HTTP Response header:
[0994:0002-1A54] client-request-id: 549b1e30-b717-498f-939b-2c7ed386f823
[0994:0002-1A54] LSXBE HTTP debug information type: HTTP Response header:
[0994:0002-1A54] x-ms-ags-diagnostic: {"ServerInfo":{"DataCenter":"France Central","Slice":"E","Ring":"5","ScaleUnit":"001","RoleInstance":"PA2PEPF0000EA8E"}}
[0994:0002-1A54] LSXBE HTTP debug information type: HTTP Response header:
[0994:0002-1A54] WWW-Authenticate: Bearer realm="", authorization_uri="https://login.microsoftonline.com/common/oauth2/authorize", client_id="00000003-0000-0000-c000-000000000000"
[0994:0002-1A54] LSXBE HTTP debug information type: HTTP Response header:
[0994:0002-1A54] Date: Mon, 05 Jun 2023 10:50:36 GMT
[0994:0002-1A54] LSXBE HTTP debug information type: Generic Information:
[0994:0002-1A54] HTTP error before end of send, stop sending

[rik-lv]

[0994:0002-1A54] LSXBE HTTP debug information type: HTTP Response data:
[0994:0002-1A54] 104
[0994:0002-1A54] {"error":{"code":"InvalidAuthenticationToken","message":"Access token has expired or is not yet valid.","innerError":{"date":"2023-06-05T10:50:36","request-id":"549b1e30-b717-498f-939b-2c7ed386f823","client-request-id":"549b1e30-b717-498f-939b-2c7ed3
[0994:0002-1A54] LSXBE HTTP debug information type: Generic Information:
[0994:0002-1A54] TLSv1.2 (IN), TLS header, Supplemental data (23):
[0994:0002-1A54] LSXBE HTTP debug information type: HTTP Response SSL data:
[0994:0002-1A54]