From time to time you may get into a situation where indexing in Enterprise Vault is lagging behind. It happened to me just the other day when ingesting a large amount of data into some test archives. I’m sure of the exact trigger, but the net result was that the indexing service stopped. This didn’t immediately cause me an issue, because the data was still added to the archive. But searching for the data was a bit tricky!
This can happen in a production environment too. Perhaps it’s something you’ve encountered, or had escalated to you from the IT Helpdesk?