Hi,

I have setup a process mailbox account on exchange and added service account with editfor permissions.

When I try to call service.FindItems using C# managed api I am getting the following error;

When making a request as an account that does not have a mailbox, you must specify the mailbox primary SMTP address for any distinguished folder Ids.

Any ideas?

I am creating the exchange service instance with the NetworkCredential of the service account.

Am I missing something obvious?

Thanks

Since you're logging on as the service account, you have to tell EWS which mailbox you want to access. Instead of using the WellKnownFolderName enum directly, you would create a new instance of the FolderId class, passing the SMTP address of the target mailbox, like so:

new FolderId(WellKnownFolderName.Inbox, "targetmailbox@contoso.com");