public static void ClearDefaultPolicies(IConfigurationSession session, IList <RetentionPolicy> defaultPolicies, bool isArbitrationMailbox) { if (isArbitrationMailbox) { RetentionPolicyUtility.ClearDefaultArbitrationMailboxPolicies(session, defaultPolicies); return; } DefaultMailboxPolicyUtility <RetentionPolicy> .ClearDefaultPolicies(session, defaultPolicies); }