| FolderId(String) | Initializes a new instance of the FolderId class. Use this constructor to link this FolderId to an existing folder that you have the unique Id of. |
| FolderId(WellKnownFolderName) | Initializes a new instance of the FolderId class. Use this constructor to link this FolderId to a well known folder (e.g. Inbox, Calendar or Contacts). |
| FolderId(WellKnownFolderName, Mailbox) | Initializes a new instance of the FolderId class. Use this constructor to link this FolderId to a well known folder (e.g. Inbox, Calendar or Contacts) in a specific mailbox. |