AD Replication Status Tool requires the following prerequisites to be met before being able to run the tool successfully in your Active Directory environment.

.NET Framework 4.0.
Access to all domain controllers from the machine you run the AD Replication Status Tool.
A domain user account which can be member in any of the domains in the forest.
AD Replication Status Tool machine may run any supported version of Windows Server (Full version) or Windows Client and must be joined to a domain in the forest where you want to collect AD Replication Status information.
Cannot be run from Server Core.