Removing unnecessary Public Folder

Identify servers with Public Information Stores and decide which ones you do not need and plan to remove the store as follows:- (taking ABCX1 Hub server as an example),

Using ADMIN,
connect to the server where you wish to remove the Public Store
ABC
Configuration
Servers
ABCX1
Private Information Store
Public Information Store

Select the Public Information Store for this server and check it's properties (File, Properties)
Check for any folders present in this store and note down the folder paths shown under the Instances tab and the folder's size / number of messages under the Public Folder Resources tab Using Admin, select each folder from the FOLDERS hierarchy
XX Address Book Views
+ Folders
+ System Folders
+ Public Folders

and change the properties of all folders with a copy on this server as follows:-
if it is a required replica of another site's folder then move the replica to your site's designated Public Store if this folder is Homed on this server change the Home to the site's Public Store server. Make sure your designated site Public store has enough capacity for these folders.
Leave for 2 days to allow the changes to take full effect. When you are ready to remove the Public Information Store from this server, schedule a 30 minute outage, stop any Monitors running against this server
Run ADMIN and connect to the server, change the Private Information Store properties, General tab, Public Folder Server box and select your site's designated Public Store server Now delete the Public Information Store by selecting the Public Information Store object, within the Server properties area and then select File, delete, this action will automatically stop and start the IS service (you may also be prompted to again specify where the alternative Public Store will be for this server - select your site's designated Public Folder server) Run Performance Optimizer a