VMware KB 2061122

Log in to the vCenter Server with a domain administrator account. If vCenter Single Sign-On is installed separate from the vCenter Server, log into the vCenter Single Sign-On server.

Open an elevated command prompt. For more information, see Opening a command or shell prompt. Navigate to the vmdird directory with this command:

c:\>cd Program Files\VMware\Infrastructure\VMware\CIS\vmdird

Open the vdcadmintool service tool with this command:

c:\Program Files\VMware\Infrastructure\VMware\CIS\vmdird>vdcadmintool.exe

This console loads:

===============================
 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
===============================

Press 3 to enter the Reset account password option. When prompted for the Account DN, enter:

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

A new password is generated. Use this password to log into the administrator@vSphere.local account.

Connect to the vCenter Server Appliance via SSH. Open the vdcadmintool service tool with this command:

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

This console loads:

===============================
 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
===============================

Press 3 to enter the Reset account password option. When prompted for the Account DN, enter:

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

A new password is generated. Use this password to log in to the administrator@vSphere.local account.