Know issues after installed Rollup 4 to Exchange Server 2007 SP1
1. After restarted server some Exchange services did not start in proper time ? solution:
In Registry Editor, locate, and then right-click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control
Point to New, and then click DWORD Value. In the right pane of Registry Editor,
Type ServicesPipeTimeout to replace New Value #1, [...]

How to display name of servers where FSMO roles are installed?
You must run command: netdom query /Domain:[domain.name] fsmo
For example:
C:\Documents and Settings\Administrator>netdom query /Domain:contoso.local fsmo
Schema owner DC1.contoso.local
Domain role owner DC1.contoso.local
PDC role [...]

Microsoft has released Update Rollup 5 for Microsoft Exchange Server 2007 Service Pack 1. You can download Rollup 5 from Microsoft download center here. This update does not apply to Exchange Server 2007 RTM.
Update Rollup 5 for Exchange Server 2007 SP1 fixes the issues that are described in the following Microsoft Knowledge Base articles:
??c KB925371 [...]

Today I had problem with Edge server.
Edge Transport Server was not able to route incoming emails to Hub Transport.
I found this error in Queue Viewer on Edge Server: 451 4.4.0 DNS query failed.
I checked Host file and it included the Host records for the Hub Transport servers.
I tested connection to Hub Server by ran [...]

Configuring password policy in Windows Server 2008 (fine grained password policies).
In Windows Server 2000 or Windows Server 2003, only one password policy could be applied to all users in the domain. In Windows Server 2008 we can define different password policies for different sets of users in a domain. This features is named ??ofine grained [...]

How to check SPF record for remote domain?
Run nslookup command
Set query to txt: set q=txt
Write domain name, for example: ebay.com
And this is all, You have answer:
ebay.com text =
“spf2.0/pra mx include:s._sid.ebay.com include:m._sid.ebay.com include:p
._sid.ebay.com include:p2._spf.ebay.com include:c._sid.ebay.com ~all”
ebay.com text =
[...]

On Microsoft pages we can read official information about Windows Server 2008 R2. It will be the next version of the Windows Server operating system includes many improvements:
- improved remote administration,
- improved file transfer services,
- reduced effort to administer and support WWeb-based applications,
- enabling Virtualization and Consolidation by conjunction with Virtual Desktop Infrastructure,
- improved availability [...]

By default, Exchange 2007 retains disabled or removed mailboxes for 30 days after deletion.
You can change this setting on ??oMailbox Database Properties???, page ??oLimits???.
Disabled or removed mailboxes are listed in Exchange Management Console -> Microsoft Exchange -> Recipient Configuration -> Disconnected Mailbox.
You can see disabled or removed mailboxes by enter the following command in Exchange [...]

After installed rollup 4 to Exchange Server 2007 all services can be disabled. You can see this errors:
Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7009
Date: 2008-11-10
Time: 11:56:10
User: N/A
Computer: EX1AW
Description:
Timeout (30000 milliseconds) waiting for the Microsoft Exchange Monitoring service to connect.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7000
Date: 2008-11-10
Time: 11:56:10
User: N/A
Computer: EX1AW
Description:
The Microsoft Exchange Monitoring service failed [...]

How to enable Remote Desktop Connection Using GPO
You must enable settings ??oAllow users to connect remotely using Terminal Services??? from
Computer Configuration -> Administrative Templates -> Windows Components -> Terminal Services