Solved

Outlook prompt for username and password on MS Exchange 2010 DAG & CAS Servers

Posted on 2010-08-26
8
3,966 Views
Last Modified: 2013-05-01
I have 2 Exchange 2010 DAG servers and 1 CAS/HUB role on single server on windows 2008  Server and Windows 2008 Domain infrastructure. Users on my network using Outlook MAPI client for emails. Some of users in the network gets username and password prompt everyday. If user open the outlook first time, their is no password prompt. But it suddenly occurs while outlook is running.  I search for the solution, but there is nothing on exchange 2010. The same problem occurs on one of another exchange 2010 DAG servers running on different domain and different LAN. I think their is an issue on exchange 2010 for password prompt. Please help me to resolve this. Thanks
Regards, Shahzeb Asif
0
Comment
Question by:shahzebasif
8 Comments
 
LVL 21

Expert Comment

by:Hendrik Wiese
ID: 33529437
Hi, Exchange uses integrated authentication so that will only happen if the users account is locked or otherwise not accessible.

Scan your network and ensure that you don't have any viruses causing the issue, also check any additional applications on the users machines that might try to use their credentials for some reason and either remove the applications or ensure that the username and password that the applications use, are correct.

Let me know if this helps.
0
 
LVL 21

Expert Comment

by:Hendrik Wiese
ID: 33529488
0
 
LVL 4

Expert Comment

by:Andre412
ID: 33529493
Another thought is that on slow network connections outlook falls back to connecting over http

Verify this is not set by looking into the settings of the account in outlook - look in more settings and under connection "connect to microsoft exchage over http" must be unchecked

The only reason you will be receiving a username password prompt is when outlook falls back to negotiating with xchange over the web service.

hope this helps
0
Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

 
LVL 21

Expert Comment

by:Hendrik Wiese
ID: 33529499
Or you could try the following and let me know if it worked:

http://support.microsoft.com/kb/300479
0
 

Author Comment

by:shahzebasif
ID: 33547633
I have tried all the options but still there is no luck. For one of the user's outlook, I have changed the logon network security settings to Password Authentication NTLM. I leave this client and will see the result tomorrow. If anybody have any other suggestion, please share with me. Thanks
0
 

Author Comment

by:shahzebasif
ID: 33565700
Can anyone response to my question. The problem is not resolve yet. Any other solution? thanks
0
 

Author Comment

by:shahzebasif
ID: 33602352
Dear All,
The problem is resolved now. I would like to share this with you all. It was related to Outlook Anywhere configuration. Actually some of my client's  outlook was configured using autodiscovery feature locally on network and Exchange proxy was automatically configured using exchange 2010 settigs for outlook anywhere. My Exchange 2010 Outlook Anywhere was configured with Basic Authentication. This was the only cause for password prompt. For testing I tried to restart MS Exchange RPC service, as it restart, the user gets password prompt. To resolve this issue, I changed my Outlook Anywhere Authentication Settings from Basic to NTLM Authentication and reconfirgured outlook client's exchange proxy settings to use NTLM. After this I never gets password prompt for any user. I think there is some issue with Basic Authentication on Outlook Anywhere Settings in Exchange 2010. Thanks

Regards,
Khurram Khan
0
 
LVL 2

Accepted Solution

by:
khurram008 earned 500 total points
ID: 33972507
Please Check with your IIS Settings for SSL Certificate. By default, it is configured as Ignore Certificate in IIS, Try to change the settings to Accept Certificate and check if outlook or OWA is prompting for username and password.
0

Featured Post

Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Are you irritated by repeating emails issue in Microsoft Outlook 2016 after recent update ?  Lets’ see how to resolve and prevent duplicate emails in the Outlook 2016 using some simple techniques.
An analysis of the phishing scam that has been affecting Google users, along with steps to take for protection, as well as what to do if you receive one of the emails.
In this video we show how to create an email address policy in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Mail Flow…
To show how to create a transport rule in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Rules tab.:  To cr…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question