OneGuard Proxy settings test removes SMTP settings and Domain Credentials that have been configured previously. Testing proxy settings in GFI OneGuard platform should not remove the SMTP settings and domain credentials from the home screen tab.
This behavior has been identified as a product defect/bug.
This proxy test defect is fixed in GFI OneGuard 2.2 patch2 release. You need to update to the latest build to resolve this issue.