Microsoft published Exchange Remote Connectivity Analyzer tool. Itâ??s will help you test your Exchange connection from Internet.
The tool will allow you to remotely test the following services:
1. Microsoft Exchange ActiveSync Test
This test will simulate the steps a mobile device uses to connect to an Exchange Server using Exchange ActiveSync.
2. Microsoft Exchange ActiveSync AutoDiscover Test
This test [...]

How to configure Outlook Anywhere by GPO?
1. Download the Article-961112.adm package from Microsoft site.
2. In the Group Policy Object Editor add the Article-961112.adm file. Click right Administrative Templates and Click Add/Remove Templates. Click ADD, locate and select Article-961112.adm file and click Open.

3. Under User Configuration -> Policies -> Administrative Templates -> Classic Administrative Templates -> Article 96112 Policy [...]

Microsoft published Update Rollup 6 for Exchange Server 2007 Service Pack 1. Update Rollup 6 for Exchange Server 2007 Service Pack 1 (KB959241) is now available for download: http://www.microsoft.com/downloads/details.aspx?FamilyID=93cb3f66-ae72-4356-bdbf-35029cff6df1&displaylang=en

Safelist aggregation in Microsoft Exchange Server 2007 refers to a set of anti-spam functionality. This functionality is shared across Microsoft Office Outlook (Junk E-mail Options in Outlook 2007) and Exchange with Edge Transport server role. You should schedule periodic updates of safelist aggregation to make sure that the most up-to-date safelist aggregation information is in the Active Directory directory service.

Exchange Edge is using self-signed certificate for the SMTP services and for subscribe new Exchange synchronization between Hub and Edge servers.
Self-signed certificates are only valid for one year.
To display certificate used by Exchange Server run this command:
Get-ExchangeCertificate | fl
To renew a self-signed certificate for Exchange Edge you can use Exchange Management Shell command:
Get-ExchangeCertificate | New-ExchangeCertificate
To [...]

How to uninstall Mailbox Role on Exchange Server 2007?

Run commend: setup /m:uninstall /r:mailbox
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How to view Exchange installed certificates in exchange management shell?
Simple run Exchange Management Shell an run the command: Get-ExchangeCertificate | fl

Verb: Services inform you with services use this certificate.
In my example this is IMAP, POP, IIS and SMTP services.

Useful links:

New-ExchangeCertificate cmdlet on Microsoft Technet: http://technet.microsoft.com/en-us/library/aa998327.aspx
Get-ExchangeCertificate cmdlet on Microsoft Technet: http://technet.microsoft.com/en-us/library/bb124950.aspx
Import-ExchangeCertificate cmdlet on Microsoft Technet: http://technet.microsoft.com/en-us/library/bb124424.aspx

 
We need certificates to publish internal Exchange 2007 services (like OWA, ActiveSync, OutlookAnywhere) using Microsoft ISA 2006. We want to get a private SLL certificate from internal Certification Authority (CA). We have to generate a certificate request, for example [...]

If you are deploying a new Exchange organization, and you are preparing your Active Directory schema and domain by using a computer running Windows Server 2008, you must first install the Active Directory Domain Services remote management tools on Windows Server 2008.
To install ADDS remote management tools run command:
ServerManagerCmd -i RSAT-ADDS

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Next you must install Windows [...]

During import mailbox data from .PST file to a mailbox when you use Exchange Management Shell console, you can see this error:
Import-Mailbox : Error occurred in the step: Moving messages. Failed to copy messages to the destination mailbox store with error: MAPI or an unspecified service provider. ID no: 00000000-0000-00000000
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You should add mailbox permission [...]