For those using ndOffice, there will be two Echo folders - one for ndOffice and the other for the traditional ActiveX functions. Each folder has its own purpose and function. This article describes each and how they interact with each other.
The purpose of the ndOffice echo is to have a location where documents, which are identical to an online document, will open from disk much faster than from the web. In other words, if a local copy exists for the document you wish to open (and the two copies are identical), the local copy will be opened rather than downloading the entire document again. This only applies to documents opened through ndOffice (not other apps such as Adobe or WordPerfect).
Additionally, the ndOffice echo folder contains a subfolder called Backup that is used for recovery purposes. If you experience any errors while opening, editing, or saving a document, we recommend you go to this location first to recover your document. You will have to manually check in (upload) any edited documents from this folder.
The purpose of the ActiveX echo folder is to be a bridge between the desktop (local) environment and the web, where normally there would be no communication. It also serves the above purpose for non-ndOffice apps (such as Adobe or WordPerfect).
The retention date set under Settings > Workstation Settings applies to both Echo folders. But, the location specified under Workstation Settings only applies to the ActiveX echo folder.
For technical reasons these two echo folders cannot use the same location.
Communication between the ActiveX echo location and ndOffice
When you click a document in the web, we use the ActiveX and the Client API to open the document and to obtain its Doc ID and Name. We then close the document, copy it to the ndOffice echo location, remove it from the Check-In List on the web, and then reopen it via ndOffice so that ndOffice “knows” about the document. At this point, the ActiveX does not manage the document, although it will still be marked as Checked Out in the web until it is checked in automatically through ndOffice.