At some point you might need to setup a VM using an ISO file. This post shows how to setup a file share for use by XenServer.
1. Within XenServer, click Storage | New Storage Repository.
2. Click the Windows File Sharing (CIFS) radio button and click next.
3. Enter the desired name and share name. Click Finish.
4. The new repository (CIFS ISO library) is displayed in the left-hand pane of XenCenter with details on the right-hand-side.
5. Now you can use the ISOs on this Windows Share to setup your VM by changing the DVD drive setting to the desired ISO.