Error:
The following error was generated when "$error.Clear();
          if (!$RoleIsDatacenter -and !$RoleIsDatacenterDedicated)
          {
            $createNewOab = $false;
            $oabName = $null;
            $oabAddressList = $null;
            $oabVdirs = $null;
            $oabGlobalWebDistribution = $false;
            $oabConfiguredAttributes = $null;

            Write-ExchangeSetupLog -Info ("Looking for an existing default OAB");
            $defaultOab = Get-OfflineAddressBook -DomainController:$RoleDomainController | where {$_.IsDefault};
            if ($defaultOab -ne $null)
            {
              Write-ExchangeSetupLog -Info ("Found a default OAB: " + $defaultOab.Name + "; checking its version");
              if ($defaultOab.ExchangeVersion.CompareTo([Microsoft.Exchange.Data.ExchangeObjectVersion]::Exchange2012) -lt 0)
              {
                $e15Oab = Get-OfflineAddressBook -DomainController:$RoleDomainController | where {$_.ExchangeVersion.CompareTo([Microsoft.Exchange.Data.ExchangeObjectVersion]::Exchange2012) -eq 0};
                if ($e15Oab -eq $null)
                {
                  Write-ExchangeSetupLog -Info ("Existing OAB is Exchange 2010 or older; will create a new OAB");
                  $createNewOab = $true;
                  $oabName = $defaultOab.Name + " (Ex2013)";
                  $oabAddressList = $defaultOab.AddressLists;
                  $oabGlobalWebDistribution = $defaultOab.GlobalWebDistributionEnabled;
                  $oabConfiguredAttributes = $defaultOab.ConfiguredAttributes;
                }
                else
                {
                  Write-ExchangeSetupLog -Info ("Already has an existing Exchange 2013 OAB:" + $e15Oab.Name + "; will not create a new OAB");
                }
              }
              else
              {
                Write-ExchangeSetupLog -Info ("Existing OAB is Exchange 2013 or newer; will not create a new OAB");
              }
            }
            else
            {
              Write-ExchangeSetupLog -Info ("Did not find a default OAB; will create one");
              $createNewOab = $true;
              
              $oabName = [Microsoft.Exchange.Data.Directory.SystemConfiguration.OfflineAddressBook]::DefaultName;
              $nonDefaultOabWithDefaultName = Get-OfflineAddressBook $oabName -DomainController:$RoleDomainController -ErrorAction SilentlyContinue | where {$_.IsDefault -eq $false};
              if ($nonDefaultOabWithDefaultName -ne $null)
              {
                $createNewOab = $false;
                Write-ExchangeSetupLog -Warning `
                  ("Offline address book " + `
                  $nonDefaultOabWithDefaultName.Name + `
                  " already exists: " + `
                  $nonDefaultOabWithDefaultName.DistinguishedName + `
                  ". Use administrative tools to change it to default OAB.");
              }

              $allGals = @(Get-GlobalAddressList -DomainController:$RoleDomainController | where {$_.IsDefaultGlobalAddressList});
              if ($allGals -eq $null -or $allGals.Count -eq 0)
              {
                $createNewOab = $false;
                Write-ExchangeSetupLog -Warning `
                  ("Couldn't find the default global address list. The default offline address book can't be created.");
              }
              elseif ($allGals.Count -gt 1)
              {
                $createNewOab = $false;
                Write-ExchangeSetupLog -Warning `
                  ("Found " + $allGals.Count + " default global address lists. You can have only one default global address list in your organization. The default offline address book will not be created.");
              }
              else
              {
                $oabAddressList = $allGals[0];
                Write-ExchangeSetupLog -Info ("OAB will be based on default GAL: " + $oabAddressList.Name);
              }
            }

            if ($createNewOab)
            {
              if ($oabGlobalWebDistribution -eq $false)
              {
                $currentAdSiteDn = (Get-ExchangeServer $RoleFqdnOrName -DomainController:$RoleDomainController).Site.DistinguishedName;
                $allOabVdirs = @(Get-OabVirtualDirectory -DomainController:$RoleDomainController);
                $e15MinimumServerVersion = New-Object Microsoft.Exchange.Data.ServerVersion([Microsoft.Exchange.Data.Directory.SystemConfiguration.Server]::E15MinVersion);
                if ($allOabVdirs -ne $null -and $allOabVdirs.Count -gt 0)
                {
                  foreach ($oabVdir in $allOabVdirs)
                  {
                    if ([Microsoft.Exchange.Data.ServerVersion]::Compare($oabVdir.AdminDisplayVersion, $e15MinimumServerVersion) -gt 0)
                    {
                      $oabVdirSiteDn = (Get-ExchangeServer $oabVdir.Server -DomainController:$RoleDomainController).Site.DistinguishedName;
                      if ($oabVdirSiteDn -eq $currentAdSiteDn)
                      {
                        $oabVdirs = $oabVdir;
                        break;
                      }
                      elseif ($oabVdirs -eq $null)
                      {
                        $oabVdirs = $oabVdir;
                      }
                    }
                  }
                }

                if ($oabVdirs -ne $null)
                {
                  Write-ExchangeSetupLog -Info ("OAB will be distributed to OAB virtual directory " + $oabVdirs.Name);
                }
                else
                {
                  Write-ExchangeSetupLog -Info ("Could not find any OAB virtual directories; OAB will be configured without distribution.");
                }
              }

              try
              {
                Write-ExchangeSetupLog -Info ("Creating new default OAB.");
                $newOab = New-OfflineAddressBook `
                  -Name $oabName `
                  -AddressLists $oabAddressList `
                  -VirtualDirectories $oabVdirs `
                  -GlobalWebDistributionEnabled $oabGlobalWebDistribution `
                  -IsDefault $true `
                  -DomainController:$RoleDomainController;
              }
              catch [Microsoft.Exchange.Data.Directory.ADObjectAlreadyExistsException]
              {
                Write-ExchangeSetupLog -Warning ("Tried to create new default OAB but the object already exists; it may have been created by another instance of setup.");
              }

              if ($oabConfiguredAttributes -ne $null)
              {
                Write-ExchangeSetupLog -Info ("Setting OAB ConfiguredAttributes to: " + $oabConfiguredAttributes);
                Set-OfflineAddressBook $newOab -ConfiguredAttributes $oabConfiguredAttributes -DomainController:$RoleDomainController;
              }
            }
          }
        " was run: "The task wasn't able to connect to IIS on the server 'TECHHC-EXC2010.hostinggiants.local'. Make sure that the server exists and can be reached from this computer: The RPC server is unavailable.
".

Moreover, i am able to connect Exchange Management shell successfully after exiting from setup (with mentioned error in previous post) but when i run the command get-exchangeserver | fl name, *role*  to get Exchange roles. Its only shows me Exchange 2013 mailbox role and i am pretty assure that i have selected both CAS and MailBox roles during installation. Kindly guide me what i am missing and what i need to do.

Hi

Did you run the setup as a member of administrator group

Also try to delete the folder 'C:\Program Files\Microsoft\Exchange Server' and verify your IPv6 is disabled.

HI Zi Feng,

Why do delete the Exchange install directory and "disable" IPV6?

MS does no testing with ipv6 disabled and the recommendation is to have it enabled even if you are not using it.

Hi guys...

 

I have some how managed to get out this by rerunning the Exchange CU2 installer and it's install the remaining roles but when i enter the password and user name for login in Exchange ECP its gives me this error "The website cannot display the page HTTP 500.........................    

Most likely causes:

• The website is under maintenance.
• The website has a programming error.

"

Am i missing some thing or Exchange is not properly installed on my server?