Rvtools Unknown Error Stsservicedll Free ((install)) | CERTIFIED |

If none of the above works, the issue may be specific to your vCenter’s SSO configuration – but you can still get your data for free.

RVTools attempts to connect to the vCenter server to retrieve data. Part of this process involves communicating with the Security Token Service (STS). If the DLL responsible for handling this service call is missing, unregistered, or blocked, RVTools throws an "Unknown Error" because it cannot complete the handshake. rvtools unknown error stsservicedll free

Try these solutions in order, from quickest to most thorough. If none of the above works, the issue