Edge client - passthrough AD credentials for single signon but only use RSA prompt in logon box

Hi - I'm trying to improve the end user experience when our users access remotely using a corporate laptop with edge. What I want to do is capture the logged on users AD cached credentials (which I can do using the edge client) and then use those variables to authenticate the user. This works and allows seamless logon. However what I need to prompt the user for is their RSA passcode without them having to enter their username into the logon panel. Does anyone know if this is doable. All the testing I have done so far relies on the fact a generic logon panel containing the username and password fields are set.