By default, our Trade Copier is able to automatically define the suffix by itself. For instance EURUSD to EURUSDm or USDCHF to USDCHFpro,...
However, for complex symbols like XAUUSD to Gold or XTI to Oil, etc. you will need to use the "Symbols Settings" functionality. It will allow you to define which Master symbol corresponds to which Slave symbol.
The mapping symbol function has to be defined master by master as each master could have specific symbols names.