Microsoft ActiveSync

» see microsoft.com/download/details.aspx?id=15 as it lived, on the wayback machine

~ the obituary ~

The cradle was a wedge of plastic with a cable out the back, serial at first and USB later, and you dropped the handheld into it face-up like a phone into a charger. Something on the desktop had to notice the device, decide what had changed on each side, and reconcile the two. On Windows that job belonged to ActiveSync, which shipped on 10 September 1996 under the name H/PC Explorer, became Windows CE Services in 1997, and finally became ActiveSync with version 3.0 in 1999.

It was never a product anyone wanted. It was the toll you paid for owning a Pocket PC. Appointments and the address book came across from Outlook, files went into a folder that pretended to be a drive, and installing anything onto the device meant running the installer on the desktop and letting ActiveSync push it down the cable. When it worked you forgot it existed. When it did not, and it often did not, the failure was total: no device, no reason given, and a support forum full of people telling each other to reinstall it in a particular order.

Version 4.5, build 4.5.5096, arrived on 13 February 2007 and was the last one Microsoft ever made. By then Windows Vista had shipped with a replacement built into the operating system, Windows Mobile Device Center, and ActiveSync was frozen as the tool for Windows XP and earlier. Microsoft's own lifecycle page puts the start of support for 4.5 at 12 May 2007 and mainstream support ending on 11 July 2012, which is the closest thing this product has to a headstone with a date on it.

Pocket PC hardware was thin on the ground where I was. A Jornada or an iPaq in Ankara in 2002 was an imported object at an imported price, and the students around me were spending what they had on a graphics card or on cafe hours. The synced-calendar life was something I read about in magazines for years before any of it turned up in a pocket I knew, and by the time it did the cable had stopped being part of the deal.

~ the case file ~

~ the cradle years ~

What ActiveSync assumed is the thing that dates it hardest: your desktop held the truth and the handheld held a copy. Every conflict resolution dialog it ever showed you was asking which copy won. The device was a peripheral with a screen, and a peripheral does not get to have its own opinion about your calendar.

That assumption survived exactly as long as handhelds could not get online by themselves. Once a phone had a data plan and could talk to a mail server directly, the desktop stopped being the center and became just another client. There was nothing left for a sync cradle to arbitrate.

~ the postmortem ~

Microsoft did not announce a shutdown. It shipped Vista, put Windows Mobile Device Center in the box, and stopped updating the old tool. WMDC then had its own long unpleasant decline, breaking on the Windows 10 Creators Update and needing registry surgery to run at all afterward, which is why industrial customers with barcode scanners were still swearing at this lineage a decade after the phones died.

Windows Mobile itself was finished by 2010. The mainstream support date in 2012 is therefore a formality about software that already had no devices to serve, but it is a formality Microsoft wrote down, and a written-down date beats a remembered one.

~ the funny part ~

Exchange ActiveSync is a different thing that took the same name, and it is not dead at all. It is the protocol your iPhone speaks to a corporate mail server, and it has been in iOS since 2008 under license. Apple pays Microsoft for the right to use a syncing standard named after a Windows utility that stopped shipping in 2007.

So the name is on billions of devices and the program is on none of them. Every time a phone quietly picks up a meeting invitation, it is doing what the cradle did, without the cradle, using the cradle's surname.

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