When working on T338778: cloudservices2004-dev: reimage into new network setup cloudservices2005-dev was made LDAP primary, which apparently now has old data (or at least, missing accounts).
Example:
aborrero@cloudservices2005-dev:~ $ sudo ldapsearch -H ldapi:/// -Y EXTERNAL | grep -i andrew SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0 uniqueMember: uid=andrew,ou=people,dc=wikimedia,dc=org member: uid=andrew,ou=people,dc=wikimedia,dc=org member: uid=andrew,ou=people,dc=wikimedia,dc=org member: uid=andrew,ou=people,dc=wikimedia,dc=org member: uid=labtestandrew,ou=people,dc=wikimedia,dc=org aborrero@cloudservices2005-dev:~ $ sudo ldapsearch -H ldapi:/// -Y EXTERNAL | grep -i aborrero SASL/EXTERNAL authentication started SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth SASL SSF: 0
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