The Exchange Management Shell is missing and how to recover

Hello Friends,

Recently i have installed Microsoft Exchange 2010 on Server 2008 R2 with fully updated OS, All configuration went well and tested all services,OWA, Microsoft Console, etc...

After all necessary Testing i have decided to Upgrade Exchange 2010 with Service pack 2, then suddenly Outlook Web Access Was not working properly with below error.

Error : 

Outlook Web App didn’t initialize. If the problem continues, please contact your helpdesk.
Couldn’t find a base theme (folder name=base)

Problem: After installing Service Pack 2 for Exchange Server 2010, the Exchange Management Shell is missing.

Cause: Missing certain .ps1 scripts from the bin directory, removed during SP2 setup.

Resolution: There is no resolution at this time.

Workaround:

1.	Verify that the ConnectFunctions.ps1 , RemoteExchange.ps1 and CommonConnectFunctions.ps1 files are present in the %ExchangeInstallPath%\bin directory. NOTE : If these files are missing, you can copy the files from the Exchange Server 2010 Service Pack 1 installation media to the %ExchangeInstallPath%\bin directory. These files are present in the \setup\serverroles\common folder.
2.	Right click an open area on the Desktop, click New , click Shortcut .
3.	In the Type the location of the item , type in the text below: %SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe -noexit -command ". '%ExchangeInstallPath%\bin\RemoteExchange.ps1'; Connect-ExchangeServer -auto"
4.	Name the shortcut Exchange Management Shell and click Finish .
5.	Right click the Exchange Management Shell shortcut, click Properties and remove the text from Start In field on the Shortcut tab.
6.	On the Shortcut tab, click Change Icon , click Browse and type in the text below: %SystemRoot%\Installer\{4934D1EA-BE46-48B1-8847-F1AF20E892C1}\PowerShell.exe
7.	Select the Exchange icon and click OK .
8.	Click Apply and click OK .
9.	Copy the new Exchange Management Shell shortcut to this location: %systemdrive%\ProgramData\Microsoft\Windows\Start Menu\Programs\Microsoft Exchange Server 2010 Run this Command to fix Outlook Web Access Problem : 1) Open Exchange Management Shell and run Power shell script which is located on below path.. C:\Program Files\Microsoft\Exchange Server\V14\Bin\UpdateCas.ps1  Good Luck...