An LDAP Quarterly Check-In is not busywork. It is a structured review of your Lightweight Directory Access Protocol service health, schema integrity, authentication paths, and security controls. Once every three months, you verify that your directory is doing exactly what it should, nothing more, nothing less.
Start with connection tests. Confirm the bind DN responds as expected over both secure (LDAPS) and unencrypted channels. Record any latency spikes. Then pull user and group listings to detect orphaned entries or stale accounts. These small gaps are often the thin start of larger compromises.
Audit permissions inside the directory. Ensure that access controls match current organizational policies. Remove roles tied to suspended accounts. Rotate service account credentials to prevent credential aging. Check referral and replication settings — mismatched replicas or broken referrals can fracture authentication across systems.