Ciao Stefano
I think that the best solution is to have two user and password, one for sme and one for the groupware, link this two user in the groupware and enable the acces at groupware with the second user and password. The user can change the password of groupware.
for example in sme:
user: sme-user
password: Sme-Password1
pseudonyms:myname.mylastname
In groupware
user: myname.mylastname
password: ThisisaPassword1
email-user: sme-user
email.pass: Sme-Password1
at first logon myname.mylastname can change the password.
Now my question is there is a groupware that can do this?
Many Thanks