Application server reachable by IP but not hostname

Scenario

Users can open the app server when using its IP address, but the hostname fails.

Recommended Resolution Path

1. Verify A and PTR records, local hosts overrides, and search suffixes.
2. Check whether multiple records or stale scavenging data exist.
3. Flush client and server DNS caches after changes.
4. If the app depends on SPNs or certificates, align the hostname configuration accordingly.

Technician Notes

Confirm the business impact, document the root cause, and capture any preventative follow-up in the PSA or client knowledge base.