Download and Install Microsoft ActiveSync
Download and Install Microsoft ActiveSync
Installing Microsoft ActiveSync to synchronize information between a computer and Pocket PC or Smartphone device
Synchronize or transfer contacts, e-mail, calendar information or files
Microsoft Pocket PC 2002 Phone Edition
Microsoft Pocket PC 2003 Phone Edition
Windows Mobile 5.0
Microsoft ActiveSync
Informational Only | Unsupported: This solution is intended for informational purposes only. AT&T provides network, billing, and provisioning support for the wireless voice and data networks. AT&T does not provide technical support for ActiveSync. AT&T makes no warranties, express, implied or statutory, as to the content within this solution; such content is provided "as is" and with all faults, and your use of the content is at your own risk. Questions regarding this solution or any additional ActiveSync support must be directed to the device manufacturer, Microsoft at, or your internal IT department.

Microsoft ActiveSync Overview



  1. Log on to Microsoft's ActiveSync site, or insert the CD into the disk drive if available.
    • If using a CD, follow onscreen instructions and skip to Step 6.
    • If downloading via website, continue with the next set of steps
  2. Select the desired version of ActiveSync to download.
    NOTE: Microsoft ActiveSync is not compatible with the new Windows Vista operating system. Synchronizing a Windows Mobile based Pocket PC or Smartphone device with a Windows Vista personal computer requires Windows Mobile Device Center.
    • Microsoft ActiveSync 4.5
      • Supports Windows Mobile devices up to 6.0
      • Requires Windows XP Service Pack 1 or later
      • Full Requirements
    • Microsoft ActiveSync 4.2
      • Supports Windows Mobile devices up to 5.0
      • Requires Windows 2000 Service Pack 4 or later
      • Full Requirements
  3. Click Worldwide English.

  4. Scroll down and click Download next to the Setup file.

  5. Click Open.

  6. Click Next.

  7. Click I accept to agree to the License Agreement, then click Next.
    NOTE: Next will not be selectable until I accept is selected.

  8. Enter User Name and Organization (optional), then click Next.

  9. Select which folder to store the application, and click Next.
    NOTE: Default location is C:\Program Files\Microsoft ActiveSync

  10. The green bar will continue to fill as the software installs.

  11. Once setup is complete, click Finish.

Once the software has been installed, a local synchronization partnership can be created.

Microsoft ActiveSync currently cannot be used with IBM Lotus applications for wireless synchronization, additionally IBM has yet to offer an alternative synchronization solution.

If you are viewing information on devices or services, please note: content reflects instructions for devices and services purchased from AT&T.
Some differences may exist for devices not purchased from AT&T.