As for the ownership of the file, we have confirmed that it can be retrieved in the local environment and in Workgroups. It has not, however, been tested to work properly in a domain or Active Directory environment. If the owner's ID cannot be obtained, the SID will be displayed. Normally you can detect file changes by selecting the date and time of the change. However, if you want to make a strict comparison, select SHA-1. SHA-1 comparisons will ensure that changes are detected. However, be aware that obtaining SHA-1 will take some time.