Change domainsid

Hi,

we have an external Samba4 Server, that use the LDAP Users from the Univention Server.
How we can change the “domainsid” from the Univention Server to our sambasid.

The Problem is, when we create a user in Univention we must manual change the sambasid in the LDAP entry to our sambasid. Otherwise the user cant access the Samba server.