Elastic connectors have two types of content syncs:
We recommend running a full sync whenever Sync rules are modified
A full sync syncs all documents in the third-party data source into Elasticsearch.
It also deletes any documents in Elasticsearch, which no longer exist in the third-party data source.
A full sync, by definition, takes longer than an incremental sync but it ensures full data consistency.
A full sync is available for all connectors.
An incremental sync only syncs data changes since the last full or incremental sync.
An incremental sync therefore usually runs much faster than a full sync.
Incremental syncs are only available after an initial full sync has successfully completed.
Otherwise the incremental sync will fail.
Incremental syncs are only supported by the SharePoint Online connector in this version.