Azure SDK C++ commit fixes this in commit b33fb227ce56f2e93625521d34be2f8970869199, should be available in the next release

diff --git a/sdk/identity/azure-identity/src/managed_identity_source.cpp b/sdk/identity/azure-identity/src/managed_identity_source.cpp
index 93a5969bf..c3d203a58 100644
--- a/sdk/identity/azure-identity/src/managed_identity_source.cpp
+++ b/sdk/identity/azure-identity/src/managed_identity_source.cpp
@@ -527,7 +527,7 @@ std::unique_ptr<ManagedIdentitySource> ImdsManagedIdentitySource::Create(
 
     imdsUrl = Core::Url{imdsEndpointEnvVarValue};
   }
-  imdsUrl.SetPath("/metadata/identity/oauth2/token");
+  imdsUrl.SetPath("metadata/identity/oauth2/token");
 
   return std::unique_ptr<ManagedIdentitySource>(
       new ImdsManagedIdentitySource(clientId, objectId, resourceId, imdsUrl, options));