On the Horizon server open cmd as administrator and navigate to Horizon folder
<cli>C:\Users\user>cd C:\Program Files\VMware\VMware View\Server\tools\bin

C:\Program Files\VMware\VMware View\Server\tools\bin></cli>
Run the iccleanup tool with following parameters:
<cli>iccleanup.cmd -vc vcenter.address.local -uid administrator@vsphere.local -skipCertVeri</cli>
Enter password of user administrator@vsphere.local
<cli>Please enter vCenter Password:
2025-08-12 13:35:56,695 [main] INFO  com.vmware.daas.cloneprep.utils.IcCleanup [] - Connecting to vCenter [vcenter.address.local]...
2025-08-12 13:35:56,929 [main] INFO  org.apache.cxf.wsdl.service.factory.ReflectionServiceFactoryBean [] - Creating Service {urn:internalvim25}InternalVimPortTypeService from class com.vmware.vim25hic.InternalVimPortType
2025-08-12 13:36:03,897 [main] INFO  com.vmware.daas.cloneprep.utils.IcCleanup [] - vCenter Connected.

 ****************************************************************************************************
 * Welcome to Instant Clone Cleanup Tool. Available commands:                                       *
 * list:               list some or all internal VMs and present them in a hierarchical structure   *
 * unprotect:          unprotect some or all internal VMs; might include the folders                *
 * delete:             delete some or all internal VMs; might include the folders                   *
 * exit:               exit the program                                                             *
 * For more help please use -h/--help as option                                                     *
 ****************************************************************************************************

> Please input the command (list/unprotect/delete/exit):</cli>
List all replicas chain to see if any are unused 
<cli>1. [Master VM 5033513d-446a-7567-2121-dcfba519ff4a Deleted]
        cp-template-53ba6a23-9dc5-4f28-9489-59fc30056a66
                cp-replica-4fbbe332-cf36-4ca0-8f77-9d05bd7eac66

2. [Master VM 50332f06-de43-336b-521f-b72933279e68 Deleted]
        cp-template-2a88b143-bce9-4afa-853b-b23101c0a966
                cp-replica-815376c0-bf0a-42d0-b010-d4afd5e6565e

3. [Master VM 5033821b-3be5-1698-f8de-df150e0d9860 Deleted]
        cp-template-5e6f6603-66c6-42ce-824d-d7fd741621ff
                cp-replica-36258381-222f-4e51-bea9-5e62268a2e08</cli>
Use then the delete command to delete these
<cli>> list> Please input the command (unprotect/delete/output/back):delete -index 1
2025-08-12 13:41:16,357 [main] INFO  com.vmware.daas.cloneprep.utils.IcCleanup [] - *WARNING*  delete command will delete all internal VMs associated with this index.
2025-08-12 13:41:16,357 [main] INFO  com.vmware.daas.cloneprep.utils.IcCleanup [] - Type 'DELETE' (case-sensitive) to continue this operation.</cli>
Validate typing DELETE
<cli>DELETE
2025-08-12 13:41:25,511 [main] INFO  com.vmware.daas.cloneprep.utils.IcCleanup [] -     Protections removed for VM: cp-template-53ba6a23-9dc5-4f28-9489-59fc30056a66
2025-08-12 13:41:25,530 [main] INFO  com.vmware.daas.cloneprep.utils.IcCleanup [] -     Protections removed for VM: cp-replica-4fbbe332-cf36-4ca0-8f77-9d05bd7eac66
2025-08-12 13:41:25,559 [main] INFO  com.vmware.daas.cloneprep.utils.IcCleanup [] -     Delete VM: cp-template-53ba6a23-9dc5-4f28-9489-59fc30056a66
2025-08-12 13:41:25,583 [main] INFO  com.vmware.daas.cloneprep.utils.IcCleanup [] -     Delete VM: cp-replica-4fbbe332-cf36-4ca0-8f77-9d05bd7eac66
2025-08-12 13:41:25,583 [main] INFO  com.vmware.daas.cloneprep.utils.IcCleanup [] - The specified group of internal VMs, with index 1 has been successuflly deleted.</cli>
Repeat for all index that must be deleted