Retry Policies are baked in the libary

MSAL has its own retry policies. In rare cases you can choose to disable the internal retry policies and add your own. See HttpClient tips.

MSAL implements a simple "retry-once" for errors with HTTP error codes 5xx

MSAL.NET implements a simple retry-once with 1 second delay mechanism for errors with HTTP error codes 500-600, for the token endpoint. For managed identity, the retry follows the guidelines of each source.

Customize the HTTP stack

In some cases, such as using proxies, you might want to customize the Http Stack. See HttpClient tips for details.