Mod_shared_roster_ldap not working

I am able to get all users in my active directory and also read their vcards on my Strophe client. but for some reason i do not get groups or even shared groups. nobody is subscribed to
another user

this is my shared roster config

%%{mod_shared_roster,[]},
{mod_shared_roster_ldap,[
{ldap_filter, "(|(objectClass=group)(objectClass=user))"},
{ldap_rfilter, "(objectClass=group)"},
{ldap_userdesc, "sAMAccountName"}
]},

can anyone pls help me with this problem

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