I know that Community Nickname and Alias are system generated fields and they automatically take values once user record is created.
However, we have a feed coming from external application containing details of user record. Community Nickname and Alias are also 2 fields coming from the system to Salesforce.
My question is : Can these fields be populated with values from External System into Salesforce or will Salesforce autopopulate these values as per its algorithm and override the values mentioned by External System feed?
Please advise.