We have an existing ASP.net web application that uses Azure AD B2C for authentication. The sign in policy used is set for SSO (across B2C Tenant). We have configured another PowerApps portal application that uses the same sign in user flow to authenticate. (Tutorial used : https://learn.microsoft.com/en-us/powerapps/maker/portals/configure/azure-ad-b2c)
Requirement is that above two application should be able to use SSO. i.e. If I am signed in on the ASP.net app and I re-direct to PowerApps, I should be automatically signed in.
Currently upon redirecting to PowerApps's login (Screenshot) I am asked to sign in again.
What can be done so that the redirection is seamless and user is automatically signed in to PowerApps application?