[JAM, MDA Compact, S100 General] Shikra:
Let me clarify on Active Sync 4. Active Sync 4 final is not out yet. What is out is Developer preview version (ActiveSync4.0 Build 4343 to be exact)

This version has lot of quirks. Unless you are using Microsoft® Windows Mobile Version 5.0 it is not advisible to shift to it yet.

As of now ActiveSync 4.0 is compatible with the following operating systems and applications and nothing else:

•	Microsoft® Windows® 2000 Service Pack 4

•	Microsoft® Windows® Server 2003 Service Pack 1

•	Microsoft® Windows® Server 2003 IA64 Edition Service Pack 1

•	Microsoft® Windows® Server 2003 x64 Edition Service Pack 1

•	Microsoft® Windows® XP Professional Service Packs 1 and 2

•	Microsoft® Windows® XP Home Service Packs 1 and 2

•	Microsoft® Windows® XP Tablet PC Edition 2005

•	Microsoft® Windows® XP Media Center Edition 2005

•	Microsoft® Windows® XP Professional x64 Edition

•	Microsoft® Outlook® 98, Microsoft® Outlook® 2000 and Microsoft® Outlook® XP, and Microsoft® Outlook® 2003 messaging and collaboration clients

•	Microsoft® Office 97, excluding Outlook

•	Microsoft® Office 2000

•	Microsoft® Office XP

•	Microsoft® Office 2003

•	Microsoft® Internet Explorer 4.01 or later (required)

•	Microsoft® Systems Management Server 2.0

The following mobile device operating systems are supported by ActiveSync 4.0:

•	Microsoft® Windows Mobile Version 5.0

•	Microsoft® Windows Mobile 2003 Second Edition

•	Microsoft® Windows Mobile 2003

•	Microsoft® Pocket PC 2002, Microsoft® Windows CE OS version 3.0

•	Microsoft® Smartphone 2002, Microsoft® Windows CE OS version 3.0

Known Problems which you can encounter with active sync 4.0 are

•	ActiveSync 4.0 does not support remote synchronization.

•	ActiveSync 4.0 does not support Backup/Restore of mobile device data.

In order for ActiveSync 4.0 to properly display extended characters in some languages, you might need to change the language that is used for non-Unicode programs.

To change the language that is used for non-Unicode programs, perform the following procedure.

1.	From the desktop Start menu, select Settings, select Control Panel, and then select Regional and Language Options.

2.	In the Regional and Language Options dialog window, select the Advanced tab.

3.	Choose from the available languages in the Language for non-Unicode programs list, which determines the language that ActiveSync 4.0 uses.

When a device is connected to a PC over an USB connection that goes through an external USB hub, you might experience connection instabilities such as drops in the connection, or an unresponsive desktop PC. For more information about this issue, see article 817900, "USB port may stop working after removing or inserting USB device" in the Microsoft Knowledge Base at http://support.microsoft.com.

To successfully uninstall ActiveSync 4.0 and reinstall a previous version of ActiveSync on your desktop PC, perform the following procedure.

1.	Uninstall ActiveSync 4.0.

2.	Open File Explorer, navigate to the System32 directory in your Windows directory, and then manually delete the dynamic-link library Rapi.dll.

3.	Reinstall the previous version of ActiveSync.

Other Problems

•	If the desktop PC operating system is upgraded, or a Service Pack is installed, you must perform a repair installation of ActiveSync in order to enable the expected ActiveSync functionality.

•	If the Windows Media Player application is upgraded to Windows Media Player 10 after you have installed ActiveSync on your desktop PC, you must perform a repair installation of ActiveSync. This enables successful Media Synchronization to a Windows Mobile-based device.

•	If the desktop PC operating system is Windows XP SP1, EHCI USB 2.0 host controllers might cause unexpected drops in the USB connection between the PC and a device.

For information about successfully resolving this issue, see article 822603, "Availability of the Windows XP SP1 USB 1.1 and 2.0 Update" in the Microsoft Knowledge Base at http://support.microsoft.com.

•	Multiple simultaneously running user sessions on a desktop PC that is running ActiveSync are not supported.

•	If non-Microsoft firewall software is installed and running on your desktop PC, you might need to configure the software to allow the following ports in order for ActiveSync to function: 5678, 5679, 990, 26675, and 5721.

•	Sometimes antivirus software that is installed on your desktop PC can conflict with ActiveSync functionality.

•	In rare cases, some LAN configuration tools might also conflict with an ActiveSync connection. To enable your Windows Mobile-based device to successfully synchronize with your desktop PC, you might need to disable the LAN configuration tools.

In most of the time it is outlook which is going to cause problem if it is not the default e-mail client. If you get error in synchronising then go to outlook help menu and choose detect and repair followed by reboot which should solve the problem