Outlook keeps asking for password to connecto to Exchange 2013

Outlook (2010 & 2013) keeps asking for password to connect to my Exchange 2013.
I have tried to create a new profile.  Autodiscover is working well, the mailbox is automatically configured.
When I start Outlook, I get the prompt to enter login & password.
Even if I check the box to save information no entry is saved in credential manager.
Outlook is working well but if I close Outlook, I have to enter again my credentials...
I have this problem with all mailboxes I want to configure or with people who recently changed their password.
SA-ITAsked:
Who is Participating?
 
Tej Pratap Shukla ~DexterConnect With a Mentor Server AdministratorCommented:
Hi..

Once a while I was also facing the same frustrating problem. I tried the steps mentioned below. It saves my problem hope it will also work for you

1). Click Start, click Run, type regedit in the Open box, and then press ENTER.
2). Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\
3). In the right pane, double-click lmcompatibilitylevel.
4). In the Value data box, type a value of 2 or 3 that is appropriate for your environment, and then click OK.
5). Quit Registry Editor.
6). Restart your computer.

Thanks
Dexter
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IvanSystem EngineerCommented:
Hi,

is this happening for internal or external users? New Exchange installation?
When you go to Outlook, Account settings, Change, More settings, and go to Security tab, how is it configured? It should be Negotiate Authentication.
Maybe it is Basic or anonymous for you, and that is why you get prompted.
Connection tab, for Outlook Anywhere, should use NTLM Authentication.

PS: These are all domain workstations, not in workgroup?
Workgroup or out of network, eg. on internet, users can/ should be prompted..
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SA-ITAuthor Commented:
It is happening for internal users.  The client configuration is like you describe.
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SA-ITAuthor Commented:
Hi Dexter Morgan,

I don't see "lmcompatibilitylevel" in path you give me.

FV
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SA-ITAuthor Commented:
It is working on computers where an entry was created in credential manager
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Sudhir BidyeCommented:
verify if you have set the outlook providers, it not set them and check if you still face the password prompt.

Set-OutlookProvider EXPR -CertPrincipalName msstd:Mail.domain.com
Set-OutlookProvider EXCH -CertPrincipalName msstd:Mail.domain.com
Set-OutlookProvider Web -CertPrincipalName msstd:Mail.domain.com
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