The vCenter Server must limit membership to the "TrustedAdmins" Single Sign-On (SSO) group.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-258957	SRG-APP-000516	VCSA-80-000291	SV-258957r961863_rule	2024-12-16	2

Description
The vSphere "TrustedAdmins" group grants additional rights to administer the vSphere Trust Authority feature. To force accountability and nonrepudiation, the SSO group "TrustedAdmins" must be severely restricted.

ℹ️ Check
From the vSphere Client, go to Administration >> Single Sign On >> Users and Groups >> Groups. Click the next page arrow until the "TrustedAdmins" group appears. Click "TrustedAdmins". Review the members of the group and ensure that only authorized accounts are present. Note: These accounts act as root on the Photon operating system and have the ability to severely damage vCenter, inadvertently or otherwise. If there are any accounts present as members of TrustedAdmins that are not authorized, this is a finding.

ℹ️ Check

From the vSphere Client, go to Administration >> Single Sign On >> Users and Groups >> Groups. Click the next page arrow until the "TrustedAdmins" group appears. Click "TrustedAdmins". Review the members of the group and ensure that only authorized accounts are present. Note: These accounts act as root on the Photon operating system and have the ability to severely damage vCenter, inadvertently or otherwise. If there are any accounts present as members of TrustedAdmins that are not authorized, this is a finding.

✔️ Fix
From the vSphere Client, go to Administration >> Single Sign On >> Users and Groups >> Groups. Click the next page arrow until the "TrustedAdmins" group appears. Click "TrustedAdmins". Click the three vertical dots next to the name of each unauthorized account. Select "Remove Member".