}
    } else {
        throw e;  // No durable handle, propagate error
    }
}
```

### 6.3 Session Integration
```java
// In SmbSession.java
private PersistentHandleManager handleManager;

public SmbSession(CIFSContext context, SmbTransport transport) {
    // ... existing initialization ...
    
    if (context.getConfig().isUseDurableHandles()) {

    } finally {
        // Don't release directory lease on close - it may be shared
        // Lease will be cleaned up by the lease manager
    }
}
```

### 5.2 Session Integration
```java
// In SmbSession.java
private DirectoryLeaseManager directoryLeaseManager;

public void initializeDirectoryLeasing() {
    if (context.getConfig().isUseDirectoryLeasing() && supports(SMB3_0)) {

                log.println("doConnect: " + addr);
            }

            tree.treeConnect(null, null);
        } catch (final SmbAuthException sae) {
            NtlmPasswordAuthentication a;
            SmbSession ssn;

            if (share == null) { // IPC$ - try "anonymous" credentials
                ssn = trans.getSmbSession(NtlmPasswordAuthentication.NULL);
                tree = ssn.getSmbTree(null, null);