Lukas Beeler's IT Blog

I recently ran into an interesting problem related to Active Sync and Cached Exchange Mode in Outlook 2003.

In this case, the user running Outlook 2003 was connected to the exchange server through a WAN link, and has just imported a rather large .pst file, which was being uploaded to the Exchange server.

At that point, i tried to configure Active Sync on the PDA (through a GPRS connection), but it just hung while retrieving the folder list. An Event from Source “Server ActiveSync” and ID 3005 was logged on the Exchange-Server. At first, i thought the device (running PocketPC 3.0) had issues with the Exchange server, but that wasn’t the case. When i quit Outlook (and it stopped uploading from the local store to the server), everything was fine.

I waited until Outlook finished uploading, and from that point on Active Sync didn’t have any issues.

It seems that Active Sync doesn’t work when the Exchange Server is receiving files from a client.