Need assistance is rewriting Host Name

Added an stream profile to change @erp-app1.xyz.com@erp.xyz.com@@erp-app2.xyz.com@erp.xyz.com@, user attempted to access and stream profile changed the response, now user can see in the browser same host name “erp.xyz.com/../logon.aspx”.

User supplies the user name and password, application does not accept the authentication on this URL “erp.xyz.com/../logon.aspx”. It seems on backend server it is configured to accept authentication on local URL only erp-app1.xyz.com/../logon.aspx or erp-app2.xyz.com/../logon.aspx.

It is not allowed to make any changes on the actual back end server.

Please suggest how to make it working. Awaiting for the response.