We are running Exchange 2003 on Server 2003. We have about 20 users connecting to Exchange through active sync on their iPhones and droids. Most of us experience some kind of problem with this connection. It hasn't always been like this, started a while ago and has gotten worst.
The event log shows event id 3005 with http status 503.
Some of the problems we are experiencing include the iPhone wiping all emails from the inbox (on the phone only) and then downloading them again, not being able to delete emails, not being able to send emails right away (takes a bit sometimes), deleting an email only to have it show up in the iPhone as unread again. The phones still connect but these problems are getting to be a nuisance for all of us.
Any ideas as to what is causing this? I’ve checked the vdir registry fix that is a common suggestion for status 503 but I’m still getting a ton of these events and the problems associated with them.
Whoever setup my email system (before my time) didn’t name it exchange-oma, it’s exchange only. Not sure if that makes a real difference or not.