Howdy All - 

Can anyone point me as to how you can search a single or multiple mailboxes for a specific email by sender or subject to find out if the email was read?

I have scoured the net and can not find anything related to this for O365 or even Exchange 2013.

Thx!

Domran

You could use EWS to search mailboxes. https://msdn.microsoft.com/EN-US/library/office/dn579422(v=exchg.150).aspx. You can easily check the IsRead property on mail items.

However, I would point out that finding out if a mail is read is somewhat troublesome. How do you know a mail was read? If it is marked read? Users can toggle the read/unread state of a message, so that's kind of unreliable. You can also right-click a folder and choose "Mark all as read", without ever actually reading the message. So depending on what you're trying to do, this may not be something you can programmatically determine.

I have been reading through the article and testing some of the examples. Is it possible to do this using Powershell or only using C#?

I can see the IsRead property that you referred to, but how do I put a search together that will search a list of mailboxes listed in a csv or text file?