MultiCompany - Sonic GlbVendor update

Our parent company uses Sonic to update our child company's GlbVendor table.  Once the child company's GlbVendor table gets updated, what process triggers the Vendor table to be updated?  For example, we are trying to build an Updateable Dashboard to update the child company's GlbVendor table and have the system update the Vendor table instead of building an Updateable Dashboard that will update the Vendor table directly since the same GlbVendor table will be used at other child companies.  If we use the updateable dashboard in the parent company, will this update push it through to the child companies via Sonic correctly?  We ran into issues doing this and looking to update the GlbVendor table at the child company level instead.