Hello,

i am having a problem with imap-clints which cannot connect.

I have tried the options with and without SSL/TLS, but the outlook-clint is not accepting the password.

In the logfile on the exchange-server in the imap-log the following errors are available:

2015-08-18T16:51:14.491Z,00000000000000D1,4,192.168.0.21:143,192.168.0.21:16354,user,32,44,405,authenticate,NTLM,"R=""b7tg NO AUTHENTICATE failed."";Msg=""System.Security.SecurityException:The user name or password is incorrect.\r\n"";LiveIdAR=OK;Excpt=""The user name or password is incorrect.\r\n-System.Security.SecurityException"";ExStk=H4sIAAAAAAAEALVSTWvDMAy9F/ofdBodDJ926q2k+yhbR1lSBru5jtKaJZKxFdr8+ykbKXT0srKdbD/J70lPyrsk2JgcXRu9dMfL3cFhEM80hWKH0CaMQLZB4AjBprTnWIJP4MlxjOjEjEfjEQBYgfwH5ypqlg+2Nm+eSt6nRYkkfeQJ4ya/XT/zlmmSi+ZtoQ10A7mtsOAPpEdLZY1XkE6B699rGSccB5G01oaOuS/amGp+h6QL/0B/ZFx6FzlxJUYt3lnaollxWDQ2mIwjmldMgSnhve0JO/OAknHTMM2cw5S+PJjM5r0A2LI/LqZeRT50GRPp+P6IsohdwQNlVns1Z/BOUcGDgDuHXiw4a2XXT8DZflnnTDg5hfRDWwvYM6CK9rv9rp+AK9AE0M3GZlN3+tBiKutrLGFv03Q8WmqtTWgF4yd/DQKENAMAAA=="
2015-08-18T16:51:14.632Z,00000000000000D1,5,192.168.0.21:143,192.168.0.21:16354,user,144,30,32,login,user*****,"R=""byy1 NO Server Unavailable. 15"";Excpt=""The user name or password is incorrect.\r\n-System.Security.SecurityException"";ExStk=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"
2015-08-18T16:51:14.663Z,00000000000000D1,6,192.168.0.21:143,192.168.0.21:16354,user,41,53,93,id,"(""name"" ""Microsoft Outlook"" ""version"" ""14.0"")",R=ok
2015-08-18T16:51:23.943Z,00000000000000D1,7,192.168.0.21:143,192.168.0.21:16354,user,27,44,434,authenticate,NTLM,"R=""n0is NO AUTHENTICATE failed.\r\n* BYE Connection closed. 14"";Msg=""System.Security.SecurityException:The user name or password is incorrect.\r\n"";LiveIdAR=OK;Excpt=""The user name or password is incorrect.\r\n-System.Security.SecurityException"";ExStk=H4sIAAAAAAAEALVSTWvDMAy9F/ofdBodDJ926q2k+yhbR1lSBru5jtKaJZKxFdr8+ykbKXT0srKdbD/J70lPyrsk2JgcXRu9dMfL3cFhEM80hWKH0CaMQLZB4AjBprTnWIJP4MlxjOjEjEfjEQBYgfwH5ypqlg+2Nm+eSt6nRYkkfeQJ4ya/XT/zlmmSi+ZtoQ10A7mtsOAPpEdLZY1XkE6B699rGSccB5G01oaOuS/amGp+h6QL/0B/ZFx6FzlxJUYt3lnaollxWDQ2mIwjmldMgSnhve0JO/OAknHTMM2cw5S+PJjM5r0A2LI/LqZeRT50GRPp+P6IsohdwQNlVns1Z/BOUcGDgDuHXiw4a2XXT8DZflnnTDg5hfRDWwvYM6CK9rv9rp+AK9AE0M3GZlN3+tBiKutrLGFv03Q8WmqtTWgF4yd/DQKENAMAAA=="

Anbody who can help me with this?

Extra info.

Outlook can now connect by imap with following format as username : domain/username/alias

Very strang, because username & alias are identical.

Why is this format needed? Can this be changed to domain/username?

Thx

Hi,

Please confirm whether the issue happens to all users or specific users to narrow down the issue .

Do you make any changes recently?

We can try to re-configure the problematic mailbox to test.

If it doesn't work, I suggest we can create a new mailbox and configure it ,then check if the issue persists on the new mailbox.

Regards,

David 

It seems i have fixed it by changing al user accounts UPN`s from .local to .com (the public domain-name).

Is this recommended in a exchange 2013 environment?

Thx

Anybody?

Hi,

Happy to hear that you have fixed it.

Based on my knowledge, changing the User Principal Name has no disadvantage.

And if you have some new problems, you can post them in the forum.

Regards,

David 

Hi,

Happy to hear that you have fixed it.

Based on my knowledge, changing the User Principal Name has no disadvantage.

And if you have some new problems, you can post them in the forum.

Regards,

David 

• Proposed as answer by David Wang_Microsoft contingent staff 7 hours 44 minutes ago

Hi,

Happy to hear that you have fixed it.

Based on my knowledge, changing the User Principal Name has no disadvantage.

And if you have some new problems, you can post them in the forum.

Regards,

David 

• Proposed as answer by David Wang_Microsoft contingent staff Tuesday, August 25, 2015 11:43 PM

There was a change with Exchange 2013 CU9 to IMAP an  POP auth.

Blog post on MSPFE is going out on Monday morning on this topic.

http://blogs.technet.com/b/mspfe/archive/2015/08/24/exchange-server-2013-cu9-watch-your-imap-clients.aspx

• Proposed as answer by David Wang_Microsoft contingent staff 4 hours 49 minutes ago

http://blogs.technet.com/b/mspfe/archive/2015/08/24/exchange-server-2013-cu9-watch-your-imap-clients.aspx

• Proposed as answer by David Wang_Microsoft contingent staff Wednesday, August 26, 2015 2:39 AM

Thx for the blog!

Before that, i changed the useraccounts upn from .local to .nl

After this the acocunt could authenticate with only the username!