@manugupta02Reader Extensions need a certificate (ares) which you have as far as i can tell. In the past I have seen such behaviour when the server applying the REs cannot connect to the Internet to download initial CRLs (Certificate Revocation Lists). Your Windows server might have had a chance to do an initial load or was configured to ignore them. I have not seen this since Adobe LiveCycle and I am not sure how the current AEM Forms OSGi has this implemented. Maybe someone else can advise what to do in that case.