Linked Mailboxes

Question

Hi,
I have two domains, domain a and domain b.  In domain a I have an Exchange 2010 server and would like to setup mailboxes for some users who have active directory accounts in domain b.  I created Link mailboxes in exchange and all worked fine for
a number of days.  Came in today and the users are being prompted for passwords when they open outlook and their own domain b\ username and password are not working.  They can however use outlook web access.
Any ideas?
Cheers

Answer 1

Hi,
Did we change anything else?
Please run Outlook under safe mode to avoid some AVs, add-ins and firewall.
Please re-create a new profile to refresh the caches.
Please delete the credential, steps as below:
1. Control Panel-->User Accounts-->click Manage your credentials in the left pane
2. Click the vault that contains the credential that we want to remove.
3. Click the credential that we want to remove, and then click Remove from vault.
Please verify our Exchange Proxy Settings via Outlook.
Steps as below:
OutlookàToolsàAccount
SettingsàE-mailàclick
the Exchange accountàChangeàMore
SettingsàConnectionàExchange
Proxy Settings
Outlook   Anywhere option
Description
On a fast network, connect using HTTP first, then connect using TCP/IP.
By default on a fast network, Outlook attempts to connect by using the LAN connection first. This option is cleared by default.
On a slow network, connect using HTTP first, then connect using TCP/IP.
By default, on a slow network, Outlook attempts to connect by using HTTP first. This option is set by default.
Password Authentication (NTLM).
The default authentication method. We recommend that you specify this option together with
Connect with SSL only and Mutually authenticate the session when connecting with SSL.
Basic Password Authentication.
With this option, users are prompted for a password each time a connection is made to the Exchange server. In addition, if users are not using Secure Sockets
Layer (SSL), the password is sent in clear text. This can pose a security risk.
If we are in the "Basic Password Authentication", please change to the "NTLM" for testing.
If still not working unfortunately, please verify our SSL principal name. Steps as below:
1. Please determine the FQDN that the client uses to access the resource. Steps as below:
OutlookàToolsàAccount
SettingsàE-mailàclick
the Exchange accountàChangeàMore
SettingsàConnectionàExchange
Proxy Settingsànote the FQND that list in the
Only connect to proxy servers that have this principal name in their certificate box.
2. Please using EMS to determine the value for the CerPrincipalName attribute: Get-OutlookProvider
This command returns the result for the EXPR name.
3. Please re-setting the CertPrincipalName attribute to match the FQDN via following command:
Set-OutlookProvider EXPR –CertPrincipalName: “msstd:<FQDN the certificate
is issued to>”
Hope it is helpful
Thanks
Mavis
Mavis Huang
TechNet Community Support