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You can set Preferred Servers, which will be displayed at the top of the list when  when you launch Client (see Starting an Axxon One Client).

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1. Go to Settings → Options → Automatic connection (1–2).
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2. In the Saved servers group,   select the Server from the list (3).

3. Change the default port if needed (4).

4. Click Add (5). 

5. Repeat the steps for all target Servers.
6. Click Apply.

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