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How to Map Client Workstation Network Drives in an ICA Session

Use the Net Use command in a logon script to map client network drives, even when the Citrix Management Console policy is enabled. For design and performance reasons, if the client mapped network drive is accessible on the network from the Citrix server, Citrix recommends that you do not use the following solution and that the network drive be mapped in a regular Windows logon script.

Note: The following point items are valid for all versions of XenApp.

• During logon, the ICA Client informs the server of the available client drives, COM ports, and LPT ports.

• Client drive mapping allows drive letters on the Citrix server to be redirected to drives that exist on the client device; for example, drive H in a ICA user session can be mapped to drive
  C of the local computer running the Citrix ICA Client. These mappings can be used by the File Manager or Explorer and your applications just like any other network mappings. Client drive mapping is transparently built into the standard Citrix device redirection facilities. The clients disk drives are displayed as share points to which a drive letter can be attached. The Citrix server can be configured during installation to automatically map client drives to a given set of drive letters. The default installation mapping maps drive letters assigned to client drives starting with V and works backwards, assigning a drive letter to each fixed disk and CD-ROM. (Floppy drives are assigned their existing drive letters.)

• You can use the net use and change client commands to map client devices not automatically mapped at logon. Use the following command and syntax:
  net use y: clientc$ where y is the drive letter in a session and c is the client drive letter you want to map.

For more information about the location and creation of logon scripts, refer to the MicrosoftHelp and Support site.
Because Presentation Server 4.0 with Hotfix Rollup Pack 1 it automatically maps Network Drives. This is not by design.
[From PSE400W2K3R02][#127532]:
'Network drives for client devices incorrectly map automatically as local client drives.'

How to Prevent Client Workstation Network Drives in an ICA Session

How to Disable Specific Client Drive Mappings

1. Open the Module.ini file in a text editor (for example, Notepad) on the client device. In most cases, this file is in the Program filesCitrixICA client directory.

2. Add the following entry to the end of the [ClientDrive] section: DisableDrives =A,D,F

3. Save the changes and exit the text editor.

4. This entry prevents the client side drive letters A, D, and F from being mapped. The entry is not case-sensitive. If someone attempts to map a 'disabled drive' through the client network within an ICA session (that is, net use * clientD$), the following error message appears:
   'System Error 55 has occurred. The specified network resource is no longer available.'

   The same restriction can be applied to an .ica file (used with published applications) by adding 'DisableDrives=' in the [Wfclient] section. Again, use a text editor to make this change.

   Another solution is to enable a policy through the management console.

How to Map Only One Client Drive at Logon

1. From Terminal Services Configuration, double-click ICA-TCP connection type.

2. Select Client Settings.

3. Clear Inherit user config.

4. Clear Connect Client drives at Logon.

5. Click OK.
   Note: Do not select Disable Client Drive Mapping; this will disable all future client drive mappings.

6. Create a logon script (.bat file) in the following format:
   net use y: clientc$ where y is the drive in a session and c is the client drive you want to map.
   Note: This does not permanently disable clients from mapping another drive when they are logged on.

How to Make the Server Drives Appear as a Client Drive When Using the Pass-Through Client

How to Map Client Drives in Pass-Through Sessions - http://support.citrix.com/article/CTX127872

For legacy version 9.xx

For version 10.xx and later

1. Run Regedit.

2. Navigate to:
   HKEY_LOCAL_MACHINESOFTWARECitrixICA
   ClientEngineConfigurationAdvancedModulesClientDrive

3. Create the Reg Value: NativeDriveMapping
   Reg Type: REG_SZ
   Add the Value: True
   When this flag is set, the client drives on the client device are not mapped and are not available. The drives configured on the server are mapped and are available to the passthrough client.
   CTX126763 – Client Drive is Not Mapped Using ICA Client Version 12 as Pass-Through Client

How to Ensure Client Drive Connectivity

Details

1. Set user profile connection configuration to allow client drive access.

2. Publish an application that runs a batch file.

3. Create a batch file that resembles the following:

IF [NOT] ERRORLEVEL number command
IF [NOT] string1string2 command
IF [NOT] EXIST filename command

• ERRORLEVEL: Number specifies a true condition if the last program run returned an exit code equal to or greater than the number specified. command - Specifies the command to carry out if the condition is met.

• string1string2: Specifies a true condition if the specified text strings match.

• EXIST filename: Specifies a true condition if the specified filename exists.

If Command Extensions are enabled, IF changes as follows:

where compare-op might be one of:

• EQU: equal

• NEQ: not equal

• LSS: less than

• LEQ: less than or equal

• GTR: greater than

• GEQ: greater than or equal

The /I switch, if specified, indicates to perform case-insensitive string compares. The /I switch can also be used on the string1string2 form of IF. These comparisons are generic in that if both string1 and string2 are both comprised of all numeric digits, the strings are converted to numbers and a numeric comparison is performed.

The CMDEXTVERSION conditional works like ERRORLEVEL, except that it is comparing against an internal version number associated with the Command Extensions. The first version is that it is incremented by one when significant enhancements are added to the Command Extensions. The CMDEXTVERSION conditional is never true when Command Extensions are disabled.

The DEFINED conditional works like EXISTS except that it takes an environment variable name and returns true if the environment variable is defined.

You can also use the numerical comparisons:

%CMDCMDLINE% expands into the original command line passed to CMD.EXE prior to any processing by CMD.EXE, provided that there is not already an environment variable with the name CMDCMDLINE, in which case you will get its value instead.

Drivers Citrix Network & Wireless Cards Free

More Information About the START Statement

START ['title'] [/Dpath] [/I] [/MIN] [/MAX] [/SEPARATE | /SHARED][/LOW | /NORMAL | /HIGH |
/REALTIME] [/WAIT] [/B] [command/program] [parameters]

• 'title': Title to display in window title bar. path - Starting directory.

• /i: The new environment is the original environment passed to Cmd.exe and not the current environment.

• MIN: Start window minimized.

• MAX: Start window maximized.

• SEPARATE: Start 16-bit Windows program in separate memory space.

• SHARED: Start 16-bit Windows program in shared memory space.

• LOW: Start application in the IDLE priority class.

• NORMAL: Start application in the NORMAL priority class.

• HIGH: Start application in the HIGH priority class.

• REALTIME: Start application in the REALTIME priority class.

• WAIT: Start application and wait for it to terminate.

• B: Start application without creating a new window. The application has ^C handling ignored. Unless the application enables ^C processing, ^Break is the only way to interrupt the application command/program. If it is an internal cmd command or a batch file, the command processor is run with the /K switch to Cmd.exe. This means that the window remains after the command is run. parameters - These are the parameters passed to the command/program.
  If it is not an internal cmd command or batch file, it is a program and runs as either a windowed application or a console application.

Files saved to a client drive is successful but the file is corrupt or the saved file reports an invalid memory location

Client Drives content may disappear in Windows Explorer and at a command prompt when applications open more than 20 file handles

MaxOpenContext = (A number ranging from 21 to 1024.)

Drivers Citrix Network & Wireless Cards Online

Note: The default is 20 file handles per drive. If it becomes necessary to increase this number, it is possible there is a handle leak with the applications accessing the client drives.

Additional Resources

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