What's the impact of creating a new server definition and what actions could be taken to recover to previous settings?

What's the impact introduced by creating a new server definition?
By creating a new server definition, Intelligence Server level settings as well as Project level settings will be reset.
NOTE:

• Web preference is reset to default.
• Trust token need be created if web SSO is used.

The server definition is a set of settings stored in the metadata which contain information about configuration locations, governing settings, and other system and project specific settings.
Server definition is dumped in the DSSErrors log when Strategy Intelligence Server is started, restarted or when the server or project level settings are changed. These settings are classified as server settings and project settings.
Refer to Knowledge Base article below for Setting Category and Details:
KB16771: What Strategy Intelligence Server process information is logged in the DSSErrors log?
In DSSErrors.log, and search for key word "Dump ServerDef -- begin" for server level settings and "Info for Project x: begin" for project level settings.
What actions could be taken to reduce the manual effort to recover to previous settings
a) Follow steps below to take a backup of the web preference with command manger
1. Launch command manager
2. Execute below query to list out the web preference and save the result for future reference.
LIST [ALL] WEBPREFERENCES [(GROUPS

 "groupname1" [, ... 

 "groupnameN"] | NAMES 

 "name1" [, ... "nameN"])] FOR (USER "username" | CURRENTUSER) IN 

 (ALLPROJECTS | PROJECT "project_name");

• Export Server level settings when Intelligence Server is running with old server definition:

1. Open the Workstation window with the Navigation pane in smart mode.
2. In the Navigation pane, click Environments.
3. Right-click the connected environment that you want to export your settings from and choose Properties.

Choose Get Info if you are using a Mac.

• In the left pane, click All Settings.
• Click Export and save the file as shown below:
  

• Export Project level settings when Intelligence Server is running with old server definition; this step need to be taken for each project

1. Open the Workstation window with the Navigation pane in smart mode.
2. In the Navigation pane, click Projects.
3. Right-click the project that you want to export your settings from and choose Properties.

Choose Get Info if you are using a Mac.

1. In the left pane, click All Settings.

• Click Export and save the file as shown below.
  

• Import Server level settings when Intelligence Server is running with new server definition:

1. Open the Workstation window with the Navigation pane in smart mode.
2. In the Navigation pane, click Environments.
3. Right-click the connected environment that you want to export your settings from and choose Properties.

Choose Get Info if you are using a Mac.

• In the left pane, click All Settings.
• Click Import and select the file you previously exported.
• Click Import.
• Select the settings you want to replace as shown below
  

• Import Project level settings when Intelligence Server is running with new server definition; this step need to be taken for each project

1. Open the Workstation window with the Navigation pane in smart mode.
2. In the Navigation pane, click Projects.
3. Right-click the project that you want to export your settings from and choose Properties.

Choose Get Info if you are using a Mac.

• In the left pane, click All Settings.
• Click Import and select the file you previously exported.
• Click Import.
• Select the settings you want to replace as shown below:
  

c) Adjust the web preference per the output in step a)