Folder.MarkAllItemsAsUnread method

Marks all items in folder as unread.

The MarkAllItemsAsUnread(Boolean) method is applicable for clients that target Exchange Online and versions of Exchange starting with Exchange Server 2013.

Namespace:  Microsoft.Exchange.WebServices.Data
Assembly:  Microsoft.Exchange.WebServices (in Microsoft.Exchange.WebServices.dll)

public void MarkAllItemsAsUnread(
	bool suppressReadReceipts


Type: System.Boolean

true to suppress sending read receipts for items; otherwise, false.

Calling this method results in a call to Exchange Web Services (EWS).