Installing Sophos Anti-Virus older Version (Previous Recommended)

 Hello,

i want to install a previous Version of Sophos Anti-Virus on my Server. (Windows Server 2008 R2)

I created a new folder (Group) with a new Update-Policy, moved my Server in it and changed the Policy-Subscription to Previous Recommended.

After that i waited until it said Like Policy and i checked on my Server if the Version has changed. It didn't

Then i tried reinstalling, without success.

I also tried installing it from the Server without success.

So here is my Question:

What is the best way to install a previous Version of Sophos Anti-Virus on a Sophos Endpoint managed by a Enterprise Console.

Thanks for the help.