Microsoft provides some documentation examples of well-designed, cost-effective Exchange 2010 solutions deployed on hardware offered by some partners from Microsoft.
16000 Mailboxes in a Single Site Deployed on IBM and Brocade Hardware
500 Mailboxes in a Single Site Running Hyper-V on Dell Servers
It’s really nice info to read 
if you designing a Exchange 2010 Solution for your company or customer.
Today the Exchange Team released Rollup 2 for Exchange Server 2010 Service Pack 1 (KB2425179). This update raises Exchange 2010 version number to 14.1.270.1.
If your upgrading from Exchange 2007 you need to implement this rollup because the bug Exchange 2007 OWA redirect bug with Exchange 2010 sp1 is fixed check: kb2458419
The List with Fixes:
983186 The mailbox alias of a user contains the "?" character unexpectedly after you run the "Enable-Mailbox" cmdlet to create a mailbox for the user in an Exchange Server 2010 environment
2295902 An excepted occurrence is not excluded from a recurring iCalendar message for an Exchange Server 2010 mailbox user
2385017 You cannot edit public folder items even though you are the owner of the items in an Exchange Server 2010 environment
2385194 You cannot connect to an Exchange Server 2010 mailbox by using a MAPI application when a Mailbox server and a Client Access server are installed on different computers
2397171 You cannot reply or forward a large email message on an Exchange Server 2010 mailbox
2403783 An incorrect label is displayed in the date field in a public folder item when you open the item by using OWA in an Exchange Server 2010 environment
2408924 The subject of an item is deleted when you use the "UploadItems" operation together with the "Update" action or the "UpdateOrCreate" action in an Exchange Server 2010 environment
2409597 You cannot open a public folder item when the default public folder database for the mailbox database is unavailable in an Exchange Server 2010 environment
2423776 The Exchange Information Store service crashes frequently during a public folder replication process on an Exchange Server 2010 public folder
2431500 You cannot connect to an Exchange Server 2010 mailbox simultaneously by using Outlook Anywhere from several Windows XP-based computers
2433642 The "FETCH (BODYSTRUCTURE)" command returns a corrupted file name of an email message attachment on an Exchange Server 2010 computer
2452075 You cannot connect to mailboxes in a recovery database on a server after you install Exchange Server 2010 SP1
2458005 The Exchange Mailbox Replication service crashes when you use the "New-MailboxImportRequest" command to import a PST file to an Exchange Server 2010 mailbox
2458419 "A temporary change has occurred that requires you to connect to a different server" error message when Exchange Server 2007 mailbox users try to access their mailboxes by using an Exchange Server 2010 Client Access server
2322161 The replay queue length on passive copies of mailbox databases in Database Availability Group continues to increase in an Exchange Server 2010 environment
982004 Exchange Server 2010 users cannot access the public folder
983492 You cannot view updated content of an Exchange Server 2010 public folder
983549 Exchange Server 2010 removes the sender’s email address from the recipient list in a redirected email message
Download the Hotfix HERE
Today the Exchange Team released Rollup 2 for Exchange Server 2007 Service Pack 3 KB2407025. This update raises Exchange 2007 version number to 8.3.137.3.
The List with fixes:
972186 Some functions do not work if you install Security Configuration Wizard on a Windows Server 2008 SP2-based Exchange Server 2007
979046 Attachments are empty when you save them by using OWA after you have applied the update of KB 958881 on an Exchange Server 2007
980038 The Microsoft Exchange System Attendant service crashes intermittently in the Oabgen.dll module on an Exchange Server 2007 server
981602 Event ID: 4999 is frequently generated in a mixed Exchange Server 2007 and Exchange Server 2003 environment
982476 The Imap4.exe process crashes intermittently on an Exchange Server 2007 server
982478 Notes URL links in a plain text message are not clickable when you open this message by using OWA in an Exchange Server 2007 environment
2028675 The MSExchangeFDS.exe process occupies lots of memory if there are thousands of OABs created on an Exchange Server 2007 server
2029086 Some characters of an email message are displayed in an incorrect text size when you access your mailbox by using OWA in Exchange Server 2007
2032216 The Microsoft Exchange Information Store service crashes on an Exchange Server 2007 server when you start it or try to mount certain databases
2121536 Exchange Server 2007 cannot index a message
2201236 The "All Day" field is marked with "No" when you access a meeting request that has a duration time that is more than 24 hours by using a mobile client through ActiveSync in an Exchange Server 2007 environment
2203212 Certain mailboxes cannot be moved from an Exchange Server 2007 server to an Exchange Server 2010 server
2210042 A sub contact folder is still visible after you set the "PR_ATTR_HIDDEN" attribute to "True" in an Exchange Server 2007 environment
2230824 The Microsoft.Exchange.POP3.exe process or the Microsoft.Exchange.Imap4.exe process may crash after you enable protocol logging for POP3 or IMAP4 on an Exchange Server 2007 server
2249814 You receive misleading information when you run the "New-TestCasConnectivityUser.ps1" script on an Exchange Server 2007 server
2263342 "The operation failed" error message in Outlook client when a user sends a recurring meeting request with an email message attachment in an Exchange Server 2007 SP2 environment
2276439 (http://support.microsoft.com/kb/2276439/ ) The Microsoft.Exchange.IMAP4.exe process crashes when an IMAP4 client retrieves a meeting request that includes exception attachments in an Exchange Server 2007 environment
2280234 "Your POP3 server has not responded in 60 seconds." error message when a POP3 client connects to an Exchange Server 2007 Client Access server to access an Exchange Server 2003 mailbox
2282570 "550 5.1.3" NDR message when an Exchange Server 2007 user sends an email message to a recipient
2265306 The Exchange Information Store service stops responding when you perform a search operation on an Exchange Server 2007 mailbox in Outlook
2282746 The "Private" sensitivity status of an occurrence of a recurring meeting request is lost when you edit the occurrence in OWA in an Exchange Server 2007 environment
2286782 The response details are still included in the response email message when you set the "EnableResponseDetails" property to "False" in an Exchange Server 2007 environment
2290105 A shared document cannot be open by using OWA after you install Exchange Server 2007 SP3 on an Exchange Server 2007 server
2290159 The POP3 service crashes on an Exchange Server 2007 server
2344372 You cannot move mailboxes to an Exchange Server 2007 server
2362371 You receive a "Success" response when using the Test-Mailflow command on an invalid or nonexistent external email address in an Exchange Server 2007 environment
2384754 "Unable to identify local server row in Replication state table for this FID" error message when you run the Information Store Integrity Checker tool on an Exchange Server 2007 server
2387915 The ESEBack component does not support ETL tracing on an Exchange Server 2007 server
2388057 The Exchange Transport service crashes on Exchange Server 2007 servers in a mixed Exchange Server 2007 and Exchange Server 2010 environment
2394731 An HTML attachment of a shared mailbox cannot be saved when you set the "BypassOwaHTMLAttachmentFiltering" setting to "True" in an Exchange Server 2007 environment
2424499 Exchange Server 2007 does not support to assign a mailbox with the "Send on behalf" permission of a security group in the EMC or in the EMS
2427297 The created time and the modified time of an attachment are incorrect when you save an email message on an Exchange Server 2007 mailbox
2430674 The "Leave message intact" method in a Folder Assistant rule does not work when you post an item by using OWA in an Exchange Server 2007 environment
Download the hotfix HERE
When I deploy client computers you have always 2 client Tasks. One for Laptops and one for Desktops.
I already blogd about joing domain. Jou can find it here. http://www.wardvissers.nl/2009/12/20/mdt-2010-join-domain/.
I had a issue joining the computers to the right ou for the two tasks.
I found a great solution to fix it.
Here is how I did it.
Open the right Task Sequence. I my case it was laptop.
This is de default setting 
Change this to: Gather local data and proces rules. Fill at Rules files customsettings.ini in. 
Open Customsettings.ini
Change the following
[Settings]
Priority=Default
Properties=MyCustomProperty
to
[Settings]
Priority=TaskSequenceID, Default
Properties=MyCustomProperty
Add the following text.
[LAPTOP]
MachineObjectOU=ou=laptops,ou=ward,dc=wardvissers,dc=local
You can do this also for Desktops.
When you deploy a new computer the computer is now in the right OU. I love MDT 
On 24 july 2008 I started my blog.
In two years time a get al lot of visitors.
Some stats till now in totally:
Hits 556.775
Unique visits 308636
Hits (bots) Hits 164201
Unique visits 93724
This year a get al lot of new visitors:
Hits (+282069) 2009: 137353 2010: 419422 still growing
Unique visits (+190172) 2009: 59232 2010: 249404 still growing
I’m very pleased with this numbers. I means for me that I do a good job.
I 
blogging.
Still writing nice about nice Stuff. I have not enough time to write every thing.
Next week have some days off. I will write some nice articles. Please if you have Questions let me now.
With kings regards,
Ward Vissers
Exchange 2010 Upgrade and Deployment (HOLO)
This 300 level hands-on labs online course (including seven hands-on labs) will prepare learners with the knowledge to engage with customers to help them implement best practices for smooth Exchange 2010 upgrades and deployments. These hands-on labs online (HOLOs) are provided at no charge to Microsoft partners, and provide IT Professionals with the essential information they need to setup, deploy, and configure Microsoft Exchange Server 2010. The course will address gaps in knowledge around topics such as new features, upgrade paths, tools and processes to support upgrade and deployment planning.
Training includes the following curriculum:
Course (Online): Using Exchange 2010 Tools to Plan a Deployment (Part 1)
Course (Online): Using Exchange Tools to Plan a Deployment (Part 2)
Course (Online): Exchange 2010 Setup, Deployment, and Server Role Configuration
Course (Online): Configuring Mail Flow and Outlook Web Access
Course (Online): Moving Mailboxes to Exchange 2010
Course (Online): Moving Other Services to Exchange 2010 (Part 1)
Course (Online): Moving Other Services to Exchange 2010 (Part 2) 
Thanks to
When you redirect users home folders to network share the folders are show as My Documents folder.
This is a bug in Windows 7
http://support.microsoft.com/kb/947222
Solution:
Do not grant the Read permission to the administrator for the Desktop.ini files on the server. To do this, follow these steps:
Note If more than one Desktop.ini file exists, follow these steps for all the Desktop.ini files.
If you have 1000+ home folders this is not great thing to do 
Richard Willis created a nice powershell script that will do it for you 
You need only change the groupName to the group that you will give deny read permissions.
Save the script in de home folder where all the “My Documents” are and run the script.
The Script:
———————————————————————————————————–
$folders = Get-ChildItem | where-object {$_.psiscontainer};
foreach ($folder in $folders)
{
$desktopIni = Get-ChildItem $folder -Filter desktop.ini -Force
if ($desktopIni -ne $null)
{
$Acl = Get-Acl $desktopIni.FullName
$Ar = New-Object system.security.accesscontrol.filesystemaccessrule `
("groupName","Read","Deny")
$Acl.SetAccessRule($Ar)
Set-Acl $desktopIni.FullName $Acl
}
}
———————————————————————————————————-
I read on Henrik Walther blog about the Outlook 2007 Online Archive Support. So I checked this on my home lab. You just need to apply the Office Outlook 2007 hotfix package (released back in October 2010) and voilá, you now have access to your online archive from Outlook 2007 
. Can’t wait when it is fully supported.
. 
After installing Rollup 1 for Exchange 2007 SP3 IMAP is now serving most text/plain parts as text/html instead. I had some issue with a simple mail import tool that now imported all mail with html codes.
Before the rollup 1 they were previously multipart/alternative messages with both text/plain and text/html subparts.
Solution:
You can set in through in the GUI or using Powershell to set the value to 0 text only
ImapMessagesRetrievalMimeFormat:
0:Text Only
1:HTML Only
2:HTML and Alternative Text
3:Enriched Text Only
4:Enriched Text and Alternative Text
5:Best Body Format
Exchange Management Console:
In the console tree, expand Server Configuration, and then click Client Access.
In the work pane, click the POP3 and IMAP4 tab.
In the work pane, select IMAP4 and then, in the result pane, click Properties.
On the IMAP4 Properties page, click the Retrieval Settings tab.
In the Message Retrieval pane, select a message format from the drop-down list under Message MIME format. I choies for 0
Click Apply, and then click OK to save your changes.
Powershell:
Set-CASMailbox -Identity yourcasserverhere -PopMessagesRetrievalMimeFormat 0
When you want to import a mailbox you get some times the following error:
MAPI or an unspecified service provider. ID no: 00000000-0000-00000000 
Solution is very easy: Give yoursell full access rights to a mailbox 
Add-MailboxPermission -identity "user" -Accessrights FULLACCESS -User "yourusername"