Hi, (sorry for my weak English )
my configuration:
redhat 5.5 x86_64
iredadmin-pro 1.3.0
dovecot 1.2
ldap

I do not know where the problem lies - after editing a user in the panel and save your changes disappear sievesecured attributes and sieve

after saving changes -  Roundcube can not, unfortunately, manage filters
logs from dovecot.log
Dec 18 17:03:13 auth(default): Info: ldap(junior@cskmswia.pl,127.0.0.1): bind search: base=o=domains,dc=cskmswia,dc=pl filter=(&(objectClass=mailUser)(accountStatus=active)(enabledService=mail)(enabledService=sievesecured)(|(mail=junior@cskmswia.pl)(&(enabledService=shadowaddress)(shadowAddress=junior@cskmswia.pl))))
Dec 18 17:03:13 auth(default): Info: ldap(junior@cskmswia.pl,127.0.0.1): unknown user
Dec 18 17:03:14 auth(default): Info: new auth connection: pid=7529
Dec 18 17:03:14 auth(default): Info: new auth connection: pid=7530
Dec 18 17:03:15 auth(default): Info: client out: FAIL   1       user=junior@cskmswia.pl

iredldif.py file found it:
# ManageService name In dovecot-1.2.
'sieve', 'sievesecured',

and that is why I added the checkbox to macros.html as additional options

   
 {% elif accountType == 'user' %}
        {% set available_services = [
                ('checkbox', 'sieve', _('REQUIRED dovecot 1.2!! - Customize mail filter rule .')),
                ('checkbox', 'sievesecured', _('REQUIRED dovecot 1.2 !! - Customize mail filter rule over TLS/SSL.')),
                ('checkbox', 'managesieve', _('Customize mail filter rule.')),
                ('checkbox', 'managesievesecured', _('Customize mail filter rule over TLS/SSL.')),
 

I know it looks ugly:) -

I question whether even Managesieve and managesievesecured is required?