How to import the Custom SSRS Report and add permission

1. Start Report Manager (SSRS Native Mode).
2. In Report Manager, navigate to the Contents page. Navigate to the report that you want to configure a report-specific data source for, and open the report.
3. Click the Properties tab. The General properties page opens.
4. Click the Data Sources tab. This opens the Data Source properties page of the report.
5. Click A custom data source to specify data source connection information within the report.
6. In the Connection Type list, specify the data processing extension that is used to process data from the data source.
7. For Connection String, specify the connection string that the report server uses to connect to the data source. It is recommended that you do not specify credentials in the connection string.
   The following example illustrates a connection string for connecting to the local SQL Server AdventureWorks2012 database:
   data source=; initial catalog=AdventureWorks2012  
   
   

8. For Connect using, specify how credentials are obtained when the report runs:
   • If you want to prompt the user for a logon name and password, click Credentials supplied by the user running the report.
   • If you intend to use the data source with reports that support subscriptions or other scheduled operations (such as automated report history generation), click Credentials stored securely in the report server.
   • If you want the report server to pass the credentials of the user accessing the report to the server hosting the external data source, clickWindows Integrated Security. In this case, the user is not prompted to type a user name or password.
   • If the data source does not use credentials (for example, if the data source is an XML file that is accessed from the file system), clickCredentials are not required. You should only specify this credential type if it is valid for the data source. If you select this option for a data source that requires authentication, the connection will fail. If you select this option, be sure to configure the unattended execution account that allows the report server to connect to other computers to retrieve data or files when user credentials are not available.

For more information about configuring credentials, see Specify Credential and Connection Information for Report Data Sources. For more information about the unattended execution account, see Configure the Unattended Execution Account (SSRS Configuration Manager).

Add permission for user account 

1. Start Internet Explorer using "Run as Administrator"
2. Open http://localhost/reports
3. Go to properties tab (SSRS 2008)
4. Security->New Role Assignment
5. Add DOMAIN/USERNAME or DOMAIN/USERGROUP
6. Check Report builder