I have 2 mail profiles - one profile has a single Exchange 2010 account and the other has a single IMAP account. I want to open an instance of Outlook for each.
outlook.exe /profile MyExchangeProfile for the Exchange profile and
outlook.exe /profile MyIMAPProfile for the IMAP profile and the result is that I get 2 instances of Outlook each with the MyExchangeProfile.
In fact, whichever profile I load first is always the one that gets loaded no matter what profile I specify on separate executions.