Hey, ChrisK.-!
To manually select your datacentre:
• Open the File Explorer.
• Navigate to C:\Users\\Documents\My Games\Rainbow Six - Siege\UplayID.
UplayID is a long alphanumeric string unique to your Ubisoft account. You will see multiple folders if you have played on more than one account.
Delete the folders and start the game from your account. You should now see a single folder for your account containing a default GameSettings.ini file.
• Right-click the GameSettings.ini file.
• Choose Open with and select Notepad.
You will see a list of game settings.
• Scroll to the bottom of the document.
You will see the following:
[ONLINE]
;DataCenterHint =>
; default (ping based)
; eastus
; centralus
; southcentralus
; westus
; brazilsouth
; northeurope
; westeurope
; southafricanorth
; eastasia
; southeastasia
; ...
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