External user having Adobe Sign account was asked to login
The external users having Adobe Sign account ever logged in were asked to login when signing the document. This behaviour is not happening to external users without Adobe Sign account.
A similar behaviour was described here https://community.adobe.com/t5/adobe-sign/e-sign-document-requires-adobe-login/m-p/9786007 but the solution is not helpful.
Is there a way to avoid this behaviour?
