Cannot sync mobile device

Has activesync been set to allow on his account?

Geminon, thank you for viewing my question. Yes, ActiveSync has been set to allow.

Maybe check in user AD profile in exchange tab if mobiles services and protocols are activated.

Did u set some specific security groups for your owa user? have also a check that user has all access like other accounts.

Another thing could be a password problem, have a try changing the user password to something very simple and set the mobile device again.

Check the inherited permissions on his account as per my Article (ignore the fact it doesn't say Exchange 2003):

https://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_2861-Activesync-Working-But-Only-For-Some-Users-On-Exchange-2007-2010.html

If that doesn't work, please read through my Exchange 2003 / Activesync article and check your settings:

https://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_1798-Exchange-2003-Activesync-Connection-Problems-FAQ.html

I have seen incorrect configuration cause some accounts to work happily and others not.

If you get stuck anywhere, please let me know.

Alan

Thank you all for your solutions. Unfortunately they were unsuccessful.

UPDATE: I was just informed by the user that he can send email successfully. The error occurs when trying to sync with Exchange.

Have you run through my article and checked your settings?

Is this just a single user that isn't working, some users or all users.

Alan, Yes, I read both articles. Settings are correct. This issue is isolated to 1 user and occurred out of nowhere. All was well until a couple days ago. No changes were made to server configurations

Okay - can you try another mobile device with the problem users account and see if that can sync.  Also try the phone that can't sync with a known good syncing account.

This should point the finger at the phone or the account.

What works / doesn't work?

make sure your user is a member of the mobile users group,  if he is then you may have to go into the exchange system manager and verify your security settings for mobile devices to ensure you are conforming to the security, for testing you can go into the security settings and add the user as an exclusion to see if they can then successfully attach to exchange.  Remember to verify your security certificate is installed on the phone for the server if needed.

Alan: We tried his phone on other accounts - success. We tried other phones on his account - cannot sync.

tmoore: Certificate is installed on phone & he is a member of mobile users group. I will try your suggestion of adding him as an exclusion tomorrow as he has left for the day.

This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.