Have you tried to provide the multiple email ids with comma separated instead of semicolon? If so how CorrNew activity is behaving. Also can you elaborate regarding the word single email that has been used in your post. Let's say i have emailid1 in To field and emailid2, emailid3 in CC field then the email should go to all the 3 persons.
My requirement is the same as u said i.e Let's say i have emailid1 in To field and emailid2, emailid3 in CC field then the email should go to all the 3 persons.
Please find the attached screenshot.I have configured in this way and while using CorrNew Activity,if i keep the flow rule in my check out ,then email is sent from my outlook email address not from the email id which i specified in the parameters of CorrNew Activity.
From your screenshot, I couldn't identify parameter FromParty value, please specify this value to send email from specific email address.
Also,getEmailSenderInfo is an activity being called inside the CorrCreate that is called from CorrNew activity which will fetch the account details for From email address, verify this activity to validate email from address.
In general getEmailSenderInfo will find an account of type Notify in Class group, check if this account type holds your outlook email address --> this could be a reason for mail being sent from your outlook email address.