You can expect the following errors while running Get-MailBox, New-MoveRequest and many other commanlets in Powershell in EMS (Exchange Management Shell):

The requested search root domain is different from the scope root domain.

or

The requested search root domain.local/Users’ is not within the scope of this operation. Cannot perform searches outside the scope ‘child.domain.local’.

Exchange 2010 has the concept of internal and external URL's for various virtual directories for the Client Access Server (CAS role).

You must correctly specify values for URLs because of potential issues with certificates and discoverability of Exchange services for your users.

Here are commandlets in powershell to control all virtual directories URLs in Exchange 2010 (most or all of them are also will work in Exchange 2013):

I've faced problem when user logged on computer running Windows XP, cannot enroll certificate from Certification Authority running on Windows Server 2012 R2.

First, enroll wizard didnt start at all, and then it start but at the final step access error was shown.

When you want to set up SSL in Apache 2, you will need to provide to the service the following items: certificate for web-site, private key for that certificate, root CA certificate that issued web-site-certificate.

In my case I got from our sequrity-men p12-file which contains certificate itself and the private key. How to convert this p12 bundle to RSA private key?

While performing intra-forest migration of user accounts with the help of Active Directory Migration Tool (ADMT) you can get the following error:

ERR2:7621 Failed to move source object 'CN=migrTEST'. Verify that the caller's account is not marked sensitive and therefore cannot be delegated. hr=0x8009030e  No credentials are available in the security package

If you try to connect Outlook 2007 or 2010 on Windows XP to Exchange Server 2013, you will face an issue of continuous password prompt for an account.

This issue is about some special kind of work with certificates in Windows XP.