Login Module validation against two different data sources

Hi All,

We have the following setup

• NW Portal 7.31
• Single stack

We are in the process of implementing Employee Self Service 1.50 WDA.

And as part of the requirement , we have implemented LDAP as the UME DataSource.

So, employees log into the portal using the LAN ID and Windows password  and are authenticated using the Logon ticket.

Now the client has come up with a requirement to have all German employees login with their ECC user id and password.

NOTE: ECC User ID and LAN IDs are the same, but the passwords are different.

a) Is it possible to use two UME data sources for logon validation.

b) Is customization of the Login module needed for this scenario?? If Yes, what components need to customized?

c) What is the best approach to handle this requirement?

Thanks.

Regards,

Raj