When using ePO - On-prem 5.10 or later to install Threat Intelligence Exchange, you need to install product extensions and installation extensions on the ePO - On-prem server.
Log on ePO - On-prem as an administrator.
In ePO - On-prem, Menu → Software → Software Catalog.
From the Category list, expand Trellix Threat Intelligence Exchange, then click Extensions.
Select Trellix Threat Intelligence Exchange 4.7.x.
From the Actions column, click check In all.
Select the checkbox to accept End-User License Agreement.
Select the branch, then click check In.
When the check-in is complete, the product Extensions are listed on the Extensions page and the installation packages are listed in the Main repository.