Does Confluence XML import warn about missing custom field plugins during restore?

Goal

Determine whether the Confluence XML import process provides an explicit warning when a required custom field plugin is absent, or whether administrators must rely on post‑import checks to detect missing custom field data.

Uncertainty

In some Confluence versions the XML import silently skips custom field values if the corresponding plugin is not installed, and the import log does not contain a clear warning about the omission.

• Does the XML import generate a log entry or warning message when a custom field plugin is missing?
• What post‑import verification steps can confirm that all custom field values have been restored correctly?