OpenVPN migration in pfsense.

Hi,

Currently we are having 2 offices, in the branch office we are running OpenVPN for connecting internal LAN and for couple of business sites.

We are planning to move OpenVPN from the branch office to Main office. What's the best possibility can i make this?

Currently there are 2 users who'll be regularly connecting to my VPN. I need to make this happen with the less downtime for both the users.