Query servers "Configure share automatically" account

I was configuring a web front-end as a query server for our SharePoint farm. So, I was trying to start the Office SharePoint Search service on that WFE but kept getting the error: Failed to configure propagation share. After some trial and search, found that the account used to propagate the share needs to be part of the WSS_ADMIN_WPG group in addition to the local administrators group.