Infrastructure: Internet <> S4B Edge <> TMG <> S4B FE . (on-premises)
I've installed a computer (workgroup) out of domain and located on Internet. I've installed S4B client. I open S4B client, set a user (user1) with access to S4B...this is OK. I can access to S4B through Edge. (OK)
If I open IE on this computer and set https://external.contoso.com/abs/handler/xxxxxx.lsabs, IE asks me for credentials. I introduce user1 credentials and i can download that file...
But, S4B can't download address book file automatically. On TMG I can see "401 (Not authorized)".
Any idea ??