All reports can be run when you are online.
To run a report while you are offline, you must first create a filter that includes the report, as well as a filter that includes any data that should be included in the report.
If you are using Outlook 2007, to create a filter (local data group) that contains reports, on the CRM menu, click Offline Filters, click New, select the the Report record type, and then define the criteria for which reports to include.
If you are using Outlook 2010, to create a filter that contains report, click the File tab. Click the CRM tab. Click Go Offline, and then click Go Offline. In the Outlook Filters dialog box, click New, select the Report record type, and then define the criteria.More information: Work with Data to Take Offline