If the System User account (Default account is-IUSR_METRO) is removed for each machine in your Performance Center environment, your ALM-PC 12.20 environment will stop functioning, and you will not be able to perform any of the tasks listed below!
HPE Performance Center documentation states the following about the Secondary Logon that is used by the Performance Center System User account (Default account is-IUSR_METRO):
The System User account (Default account is-IUSR_METRO) is required on the following machines in your ALM-PC 12.20 environment.
* Performance Center Servers
* Performance Center Hosts
* Standalone Load Generators
It is required for the following IUSR_METRO related tasks:
* Adding the Performance Center Server
* Adding a Host
* Starting a test run
* Installing a patch
If the System User account (IUSR_METRO) needs to be removed by your Security, a domain admin account can be used to replace the local (IUSR_METRO) account. The account must be changed in a specific procedure with the Change Identity tool located on the PC server