Invalidate a MID Server Invalidate a MID Server you suspect has been compromised to prevent it from accessing automation credentials in the instance or executing outbound ECC probes. Before you begin Role required: admin About this taskInvalidating a MID Server forces it to clear its memory and restart. The MID Server generates a new keypair on restart. Procedure Navigate to MID Server > Servers. Open the record for the MID Server you suspect has a security issue. Under Related Links, click Invalidate.