YouTube – NIST 800-171 Control 3.5.5 Prevent reuse of identifiers for a defined period

CMMC Level 2 Assessment Guide

Texas A&M – Sample Identification and Authentication Policy

NIST SP 800-53 Rev 5: IA-4 Identifier Management

Microsoft – Configure CMMC Level 2 Identification and Authentication (IA) controls

Identity Automation – Definitive Guide to Account Username Conventions