| SyncFolderHierarchy(PropertySet, String) | Synchronizes the entire folder hierarchy of the mailbox this Service is connected to. Calling this method results in a call to EWS. |
| SyncFolderHierarchy(FolderId, PropertySet, String, CancellationToken) | Synchronizes the sub-folders of a specific folder. Calling this method results in a call to EWS. |