Exchange server locks me out with bad credentials

My problems continue (similar to what ddangle reports) as well.

I deleted all accounts from Outlook for Mac 2011, then after adding my account and letting it rebuild itself, I seemed to run for several weeks without getting locked out. But then I was locked out again today in the same way.

What is really odd is that this almost always happens on Saturday morning. I have no idea why.

When I get in this state, my administrator can see that something continues to send a stream of bad password attempts to the Exchange server. It is as if a rogue process just starts sending bad login attempts to the Exchange server. I need to reboot the MacBook to get this to stop, I believe. More debugging is necessary, but it is difficult to do because it only gets in this state occasionally.

But again, I ran Outlook for Mac 2011 for a couple of years without ever seeing this. I've only seen it since doing the Mavericks upgrade.

I'm having a similar problem. Ever since I upgraded to Mavericks, I am getting locked out of the Exchange server due to bad password attempts at least once a week. Strangely, it seems to happen every Saturday, but has also happened a few times during the week. From what the administrator can tell, everything is running fine for a while, then my account starts receiving a sequence of logins with bad password attempts and that eventually locks me out of Exchange.

This has worked perfectly for years... just started after upgrading to Mavericks.

Help appreciated!

I am suddenly having the exact same problem. My administrator told me the same thing. Exchange reported:

Nov 27 09:26:42 MSWinEventLog 5 Security 494 Wed Nov 27 09:26:41 2013 4740 Microsoft-Windows-Security-Auditing N/A Audit Success 13824 A user account was locked out.

Additional Information:

Caller Computer Name: MacBook-Pro.local

My MBP is the only computer on the network with Mavericks. I too login with my same credentials and then it works just fine. I use Apple's Mail, Calendar, Notebook, and Reminders. No MS Outlook.

This needs to be addressed.

I might have found a fix for this, at least in my case, thanks to some smart folks over on JAMFnation (see post and link below).

Even though I do all mail, calendars and contacts through Outlook, there was an Exchange entry at System Preferences -> Internet Accounts that was trying to sync Contacts. It seems logical that this was trying to log in with a bad password and causing the lockout. So I removed it and I'll see if that takes care of the problem.

-Mark

The key post:

I had this issue on a user's account as well. I was troubleshooting Outlook with no success. The issue turned out to be incorrect credentials stored in an exchange account entry on the user's home computer under System Preferences -> Internet Accounts. The OS just kept attempting to access that account without ever popping up any errors. The user's account would lock out several times a day.

Link to full chain: https://jamfnation.jamfsoftware.com/discussion.html?id=8921

Same exact problem. Simply deactivating the Exchange account under "Internet Accounts" didn't work for me. I actually removed the Exchange account from the list of Internet accounts. Hopefully that will solve the problem. I am currently locked out. I'll know in 30 minutes

Following up on this, the answer is no. Deleting the Exchange account did not resolve the issue. Although, i haven't re-started since deleting it.

bigair - are you by chance syncing your mail to iCloud from your phone (assuming you have an iPhone)?

I had this same problem that started after I upgraded to Mavericks. I turned off the email sync through iCloud on my iPhone hoping that would fix the problem but it didn't. Then I deleted the Exchange account under internet accounts. Maybe you need to do both? At any rate, it appears to have worked. I haven't been locked out for 2 straight days. That's the longest I've gone since upgrading to Mavericks.

I fixed this. I did nothing on my iPhone. What I did was delete the Exchange account under Internet Accounts in System Preferences. I also turned off Sync Services within Mac Outlook 2011. Voila.

Nice. It seems that the Internet Accounts is the culprit. Somehow the update to Mavericks must have awakened some dormant Exchange account in the native Mac Mail app. Not sure where that came from since I've never used it. But it somehow got a hold of a bad password.

At this point, I don't really care WHY it happened, just that it's fixed 🙂

Neither of these accounts are active for my Mac yet im still locked out. Oddly enough it only seems to happen when im on Wi-Fi. Ive also erased my old entry from keychain for the wi-fi entry and re-added it.

I am having the same problem. I posted details in another thread, but it has occurred after clearing preferences, cache, ~/Library data, etc.. And it occurs after switching from wired to wireless networks and vice versa, but not always.