Send mail activity under the Microsoft Office 365 Scope is not working: All recipients must be resolved before a message can be submitted

Hi There, can anybody please have a look at the screenshot below and point me out what am I missing?
The idea is, I am trying to grab the CC item from the email( in this case the email is mgs365.office365Message). And then using the CC item in the “To” field of the Send Mail activity, and that’s where its failing.
I can guess it a variable type issue. But how can I solve it?

Thanks in advance!

Hi @jahidKM

Send Mail activity will take only array of string as input.

I am assuming item variable holds only one mail ID. In To field try giving → {item.ToString}

I hope it helps!