Hi Buddika_W,

This forum is discuss and ask questions about .NET Framework Base Classes (BCL) such as Collections, I/O, Regigistry, Globalization, Reflection. Based on your description, your case more related Exchange development, I will help move this case to Exchange Server  > Exchange Server Development forum for better support.

Have a nice day!

Kristin

Is it possible to use Shared Mailbox and send mail using sendAs option (in C# application)? if there is, please share your advice on this matter. I'm using office 365 services.

• Moved by Herro wongMicrosoft contingent staff 23 hours 32 minutes ago

Thank you Kristin Xiew

Sure as long as the account running your code has been assigned SendAs Rights to the Shared Mailbox via the Add-RecipientPermission Cmdlet (or the Admin Console) in the EWS Managed API something like this should work

            Mailbox SharedMailbox = new Mailbox("sharedMailbox@domain.onmicrosoft.com");
            EmailMessage SharedEmail = new EmailMessage(service);
            SharedEmail.ToRecipients.Add("blahblahblah@domain.com");
            SharedEmail.Subject = "This is a Test";
            SharedEmail.Body = new MessageBody("Test");
            SharedEmail.From = SharedMailbox.Address;
            SharedEmail.Sender = SharedMailbox.Address;
            SharedEmail.SendAndSaveCopy(new FolderId(WellKnownFolderName.SentItems, SharedMailbox));

Cheers
Glen

• Edited by Glen ScalesMVP 3 hours 2 minutes ago