Hi… This days I recieved some questions regarding the problem of Outlook 2007 repromting for username and password when connected to Exchange 2007 (mostly in SBS 2008 environments)…
Saso has an explanation for this phenomenon 
http://exchange.si/archive/2010/01/12/pow-11-kb973917-and-repeated-login-prompts.aspx
Almost two years ago I have posted a comment regarding Blacklist providers that I use and I trust… Well I would like to update this post by adding or commenting that now I use only two providers that sucessfuly eliminate or reduce spam that is coming to my mail servers …
I currently use:
zen.spamhaus.org provided by http://www.spamhaus.org
bl.spamcop.net provided by http://www.spamcop.net
As you should decide to use or not to use blocklist providers on your mail servers I am adding interesting article from august 2009 to better understand how this providers work: http://www.allspammedup.com/2009/08/understanding-blocklist-providers/
I wish you luck in fighting spam!
For all you with any problems or concerns regarding Microsoft Exchange connectivity… You can test your Exchange server services like ActiveSync, Exchange Web services or Outlook connectivity by using: https://www.testexchangeconnectivity.com/ - fresh and new
EHLO team r0x! http://msexchangeteam.com/
Yes! I managed to make it work…
Exchange transport won’t start if you are installing Exchange 2007 SP1 on Windows server 2008 with Active directory on it even if you UNCHECK IPv6 on your network card properties…
The installation won’t complete… 
You need to do it this way:
1. Uncheck Internet protocol version 6 (TCP/IPv6) in your network card properties
2. Delete localhost value for ipv6 in file called HOSTS in C:\Windows\System32\drivers\etc
::1 localhost
or comment it by using # at the start of line
3. Create/add a 32 bit DWORD with name DisabledComponents and value 0xFFFFFFFF to:
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
My setup was Windows server 2008 standard as Hyper-V platform, inside Windows server 2008 standard with Active directory in functional level 2008 – everything updated and clean.
When I changed this three parameters exchange setup completed sucessfuly and now my testing Exchange 2007 is working! Wiiiii!!!
1. Sorted by Displayname (Display name, Mailbox size (MB), Item count, Last logon time, Last logoff time, Last loggedon user account)
Get-MailboxStatistics -Database “mailbox database” | Sort -Property DisplayName | ft DisplayName,@{expression={$_.totalitemsize.value.ToMB()};label=”Mailbox Size(MB)”}, itemcount, lastlogontime,lastlogofftime,lastloggedonuseraccount
2. Sorted by Last logon time
Get-MailboxStatistics -Database “mailbox database” | Sort -Property lastlogontime | ft DisplayName,@{expression={$_.totalitemsize.value.ToMB()};label=”Mailbox Size(MB)”}, itemcount, lastlogontime, lastlogofftime
Get-MailboxStatistics -database “SERVER\Mailbox Database” | where {$_.disconnectdate -ne $null} | foreach {Remove-mailbox -database $_.database -storemailboxidentity $_.mailboxguid}
New-PublicFolder -Name “test@test.com” -Path \TEST
Enable-MailPublicFolder -Identity “\TEST\test@test.com”
Set-MailPublicFolder -Identity “\TEST\test@test.com” -EmailAddressPolicyEnabled $false
Set-MailPublicFolder -Identity “\TEST\test@test.com” -EmailAddresses “test@test.com”, “test@test.net”, “test@test.org”
Set-MailPublicFolder -Identity “\TEST\test@test.com” -PrimarySmtpAddress test@test.comAdd-PublicFolderClientPermission -Identity “\TEST\test@test.com” -User Username -AccessRights EditorGet-PublicFolderClientPermission -Identity “\TEST\test@test.com” | fl
1. step
New-ExchangeCertificate -generaterequest:1 -domainname domain.com,mail.domain.com,smtp.domain.com,pop3.domain.com -privatekeyexportable:1 -path c:\cert.txt -force:1
2. step
Import certificate request using web access to your Certification authority - logon as administrator! (WEB SERVER!!!)
3. step
Export certificate to a location on the disk… c:\certnew.crt
4. step
Import-ExchangeCertificate -path c:\certnew.cer
5. step
Enable-ExchangeCertificate -thumbprint 5ACC9A5D90E2CFDBAD6E25CD02362B8954506810 -Services “IIS,POP,SMTP,IMAP”
To remove old certificates:
Remove-ExchangeCertificate -Thumbprint …………
New-AutoDiscoverVirtualDirectory -websitename “SITE-NAME” -WindowsAuthentication $true -DigestAuthentication $false -BasicAuthenticvation $true