Rebulding failed server - which version to install?

SUGGESTED

Hi,

I've had to rebuild a 2008R2 server following a raid drive failure. This was acting as the company's Sage 50 server. All data is safe and sould on a second raid volume and backed up.

Currently, users are on V28.1. My question is, on the server, should I install V28.1 or V30?

If I install V30, will it upgrade files so that V28.1 no longer works?

Would it be best to upgrade all users to V30 anyway?

Thanks for any advice.

Regards

Mark