The following example shows you the UID search with 400 as the search parameter:
<pre>
ldapsearch -H ldaps://ldapm.tombstone.ch -b "dc=foss-cloud,dc=org" -s sub -x -D "cn=Manager,dc=foss-cloud,dc=org"\
-W "(&(sstBelongsToResellerUID=4000000)(sstBelongsToCustomerUID=4000001)(uid=400*))"
</pre>