SSRS Scale-out Deployment–How to remove Instance

If you need to remove a SSRS SQL Server database instance from Reporting Services Configuration Manager such as due to migrating a RS database from one server to another, you can do so by running the RSKeyMgmt command.

On your Report Server, open a command prompt and enter the following to find the GUID you want to remove.

RSKeyMgmt –l

The above parameter is a lower case “L” not a one.   That will return your list of machine instances. Mark and copy the GUID of the instance to remove. Then enter the following to remove that instance from that Report Server’s configuration.

RSKeyMgmt –r <GUID>

Yes or No: Y

Now your instance is removed from this RS configuration.

Reference Material:  http://msdn.microsoft.com/es-py/library/ms162822(v=SQL.110).aspx