If you want a list with al the pda’s that are connected to your Exchange Organization.
You can use the following Powershell command let.
Get-Mailbox –resultsize unlimited | Get-ActiveSyncDevice | fl userdisplayname,DeviceModel,Devicetype, DeviceUserAgent > c:\pdas.txt
I was attended on twitter on the following video’s. I watch some of them. They are really interesting 
I had some Windows Mobile device that did not sync anymore. I changed the Certificates on Exchange 2007 and ISA 2006 Servers.
After some investing. The problem was I was missing the GlobalSign Domain Validation CA certificate
After creating the cer file and installed on my PDA active sync works again.
Jonathan has created a nice script. This script checks witch updates are missing from Hyper-V hosts and SCVMM Server.
What updates?
Updates are regularly released for SCVMM Server, Hosts, and the Admin Console. These updates must be applied to all Hosts no matter how many you have. Updates are also released for technologies SCVMM leverages:
As well as components SCVMM cannot function without:
The difficulty is in making sure all systems are fully updated. This is a time-consuming task.
WSUS takes care of this for me…
Not necessarily. There are certain Hotfixes that need to be downloaded manually, but for the most part Windows Update is the key. WSUS is Microsoft’s solution to distributing Windows Updates within an enterprise, and this pulls from Windows Update as well. Unfortunately, rules in WSUS are sometimes set up such that all updates required do not find their way to SCVMM systems. So, there are layers of complexity in keeping systems up to date.
Prevent problems with VMMUpdate
With this script you now or that your Hyper-V hosts & SCVMM Server are up to date.
To download the latest follow the link HERE
The management pack monitors the health status of System Center Data Protection Manager 2010 and its components. It alerts the admin on critical health state and it provides certain break fix tasks to take corrective actions.
The following alerts are new in this release of the DPM 2010 Management Pack:
You can download the System Center Data Protection Manager 2010 Monitoring Management Pack HERE
If your are an Exchange Admin I can recommend the following book Microsoft Exchange Server 2010 Best Practices. It covers SP1. It contains the following Chapters.
Part I Preparing for Exchange Server 2010
Chapter 1: Introducing Exchange Server 2010
Chapter 2: Exchange Deployment Projects
Chapter 3: Exchange Environmental Considerations
Part II Designing Exchange Server 2010
Chapter 4: Client Access in Exchange 2010
Chapter 5: Routing and Transporting
Chapter 6: Mailbox Services
Chapter 7: Edge Transport and Messaging Security
Chapter 8: Automated Message Processing, Compliance, and Archiving
Chapter 9: Unified Messaging
Chapter 10: Federated Delegation
Chapter 11: Designing High Availability
Chapter 12: Backup, Restore, and Disaster Recovery
Chapter 13: Hardware Planning for Exchange Server 2010
Part III Upgrading to Exchange Server 2010
Chapter 14: Upgrading from Exchange Server 2003 and Exchange Server 2007
Part IV Deploying and Managing Exchange Server 2010
Chapter 15: Preparing for a Deploying Exchange Server 2010
Chapter 16: Managing Exchange
Chapter 17: Operating and Troubleshooting Exchange Server 2010
This book is also not a preparation guide for Exam 70-662: TS: Microsoft Exchange Server 2010, Configuring, or Exam 70-663: Pro: Designing and Deploying Messaging Solutions with Microsoft Exchange Server 2010, even though when you apply the knowledge and experience covered in this book, it will help you to pass these exams.
At least Microsoft released the Exchange Server 2010 Architecture Poster.
To download just click on the picture.
One another thing to tomorrow: find the biggest printer 
In SP1, this redirection is no longer silent. When your Exchange 2007 user logs in via webmail.wardvissers.nl, they are presented with this screen:
The text reads:
A temporary change has occurred that requires you to connect to a different server. To connect, click the button below. For security reasons, you’ll be asked to enter your user name and password again.
Sure enough, when you click Connect, you are redirected to legacy.wardvissers.nl, where you have to re-enter your user information.
Thankfully, the same sort of thing doesn’t seem to happen with Outlook Anywhere or ActiveSync clients.
I checked the LegacyRedirectType value on my 2010 SP1 CAS boxes and they are all still set to Silent. The issue occurs because the OWA virtual directory value for LegacyRedirectType is being ignored. This is an extraordinarily unfortunate thing to have been introduced with SP1. If you have a mixed Exchange 2007/2010 environment, I suggest you wait until the rollup 2 is out before deploying SP1.
Update 15 December 2010
Update 2 for Exchange 2010 and the fix is there described 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
You can download the rollup HERE
Microsoft released Rollup 1 for Exchange Server 2010 SP1 that fixes the following things.
2028967 Event ID 3022 is logged and you still cannot replicate a public folder from one Exchange Server 2010 server to another
2251610 The email address of a user is updated unexpectedly after you run the Update-Recipient cmdlet on an Exchange Server 2010 server
978292 An IMAP4 client cannot send an email message that has a large attachment in a mixed Exchange Server 2010 and Exchange Server 2003 environment
982004 Exchange Server 2010 users cannot access the public folder
983549 Exchange Server 2010 removes the sender’s email address from the recipient list in a redirected email message
983492 You cannot view updated content of an Exchange Server 2010 public folder
Download Rollup 1 for Exchange Server 2010 SP1 HERE
For Exchange 2007 you had PFDAVAdmin to set rights on the Public Folder store.
For Exchange 2010 (RTM & SP1) you have the tool ExFolder to set rights on the public Folder store.
But the Exchange Team did a great job to add Public Folder Rights to the Public Folder Management Console.
When you right click on the a public folder you can set permission on two ways.
1. Right click on the public folder and choose Manage Settings
I give my self Owner rights for this little demo.
2. Select Properties from the public folder and then select the Permissions tab. 