Kolab User Passwords

[Reitelbach, Thomas]

Hello list,

I'm running Kolab 16 on CentOS 7 with multi domain support (4 Domains) 
for some years now.

Today I added a new Kolab User and set the password. But the new user 
can't login with roundcube ("Login failed" says roundcubemail). And the 
logs also say failed login.

Old users can still login as usual with their password.

After some investigation I found that "kolab user-info user at domain" 
shows a "userpassword:" with

u'{SSHA512}................'

and old users are encrypted like this:
u'{SSHA}................'

I guess that with some system update something in the underlying system 
has changed and new passwords are beeing stored as SHA512 now, which 
makes roundcube or ldap fail to check the password.

Has anyone help for me? Can I setup how roundcube webadmin will encode 
the password in LDAP?
Can I manually set the password in LDAP?
I'm not familiar with LDAP queries and need help with that.

Have a nice Christmas :)

Thomas