I just learned from engineering neat trick related to how cell management tool can be invoked without specifying administrator credentials.
The issue is that currently you cannot use LDAP account to trigger cell management tool commands which are mostly used for quiescing and shutting down cells for maintenance. Using vCloud Director local administrator account is discouraged as it poses a security issue. However what is possible is to trigger the cell management tool as root (or with sudo) and supply via hidden flag -i the process ID of the java process.
Here is an example:
First I query the java PID with ps aux command. Then I use the standard cell-management-tool command without specifying the user with the -i flag at the end.
So you can force the administrator to log in to the cell guest OS via a LDAP account and then run the command with sudo.
Thank you Zachary Shepherd for the tip.
Georgi provided great tip in the comments. As the PID is written in var/run/vmware-vcd-cell.pid you can actually run a one-liner.
/opt/vmware/vcloud-director/bin/cell-management-tool cell -i `cat /var/run/vmware-vcd-cell.pid` -t