Connect to the vCenter Server Appliance via its console or via SSH.

Run the vdcadmintool service tool:

/usr/lib/vmware-vmdir/bin/vdcadmintool

The console will load:

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Please select:
0. exit
1. Test LDAP connectivity
2. Force start replication cycle
3. Reset account password
4. Set log level and mask
5. Set vmdir state
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Press #3

When prompted for the Account DN, enter:

cn=administrator,cn=users,dc=vSphere,dc=local

A new password will be displayed.

This