VCenter will show alerts regarding VMware Tools is outdated.
The VRA's OVF comes with a VMware Tools version which is constantly tested with its components. If such a change is needed it will come in the form of a VRA upgrade from within Zerto and will be pushed with a new minor version.
Upgrading the VRA's VMware Tools manually in vSphere is not recommended.
If the VRA's VMware Tools is upgraded, Zerto can not guarantee proper functionality.
Should a VRA's VMware Tools be upgraded, kindly re-deploy the VRA to resolve/avoid potential impact.