The concept behind Milestone Interconnect
With Milestone Interconnect, multiple remote sites running any XProtect product can be interconnected with a central XProtect Corporate site.

This offers central XProtect Corporate site users seamless access to live and recorded video, audio, and metadata regardless of whether the recording is done on the remote site, on the central XProtect Corporate site, or on both.
Furthermore, it offers administrators and users on the central XProtect Corporate site, advanced functionality for all the interconnected sites, even when the VMS product running the interconnected site natively does not support this function, for instance:
Advanced rules
Recording retrieval functionality with support for SVQR
Detailed and time-based user rights
Evidence Lock recordings recorded or retrieved to the central XProtect Corporate site
Create Bookmarks for interconnected cameras on the central XProtect Corporate site
Bookmarks created on remote sites cannot be viewed or managed centrally
Create Alarms for interconnected cameras on the central XProtect Corporate site
Alarms triggered on remote sites cannot be viewed or managed centrally
The interconnected sites can be accessed and managed locally, like any standard stand-alone site.