there is not standard way for this as this is not a direction that users / groups are commonly transferred in. Typically, users / groups are imported into Alfresco from an external identity management system and this is supported in the standard (e.g. <a href="http://docs.alfresco.com/5.0/concepts/sync-intro.html">synchronization</a>). Anything in the other direction is non-standard and always relatively complex as it almost certainly requires knowledge of at least JavaScript and the API available therein (or Java, which typically is more of a hurdle for non-developers). One basic route to go would be to write a JavaScript script (perhaps using the JavaScript Console addon) to retrieve all groups / users from the Script API authorityService and build up a CSV file within Alfresco that can then be downloaded and imported into another system (either directly or after transformation into a format that target system can handle).
