M. Omer Siddiqui's Blog

Disk Read Error when migrating virtual machine from one cluster to another

Exchange Server 2016 Online Training Courses

M. Omer Siddiqui — Mon, 22 Aug 2016 16:35:37 GMT

Microsoft Exchange team recently released some Exchange Server 2016 courses that is great learning and you can attend them if you are planning to implement Exchange Server 2016. The course are listed below:

Course 1x: Microsoft Exchange Server 2016 Infrastructure: Learn how to plan, configure, and manage Active Directory infrastructure requirements for Microsoft Exchange Server 2016.
Course 2x: Microsoft Exchange Server 2016 Client Access Services: Find out how to plan and implement mobile messaging, Outlook, and secure Internet access to improve client access services.
Course 3x: Microsoft Exchange Server 2016 Mailbox Databases: Get the details on planning and configuring mailbox databases, including backup, recovery, and restoration.
Course 4x: Microsoft Exchange Server 2016 Transport Services: Explore planning and configuring message transport services, including anti-virus, malware-filtering, and spam-filtering solutions.

The first course on Microsoft Exchange Server 2016 Infrastructure, is free. The remaining three courses are for-fee courses. Hope you enjoy these courses!

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Disk Read Error when migrating virtual machine from one cluster to another

Step by step guide for upgrading Active Directory from Microsoft Windows 2008 R2 to Microsoft Windows Server 2012 R2

https://blogs.technet.com/b/privatecloud/archive/2013/11/05/troubleshooting-configuration-of-windows-azure-pack.aspx

Integration of Windows Azure Pack, SPF and SCVMM

M. Omer Siddiqui — Sun, 13 Dec 2015 09:03:18 GMT

Recently i was troubleshooting some integration issues between SCVMM, SPF and Windows Azure Pack (WAP) and found below articles that were really helpful and I thought to share with the everyone for benefit of similar issues.

Troubleshooting Installation & Configuration of Windows Azure Pack – An Introduction

Troubleshooting Windows Azure Pack, SPF & VMM

https://blogs.technet.com/b/privatecloud/archive/2013/11/08/troubleshooting-windows-azure-pack-spf-amp-vmm.aspx

Configuring SPF and Windows Azure Pack for IaaS usage and metering

https://blogs.technet.com/b/privatecloud/archive/2013/09/30/configuring-spf-and-windows-azure-pack-for-iaas-usage-and-metering.aspx

Troubleshooting Windows Azure Pack & Usage (Part 1)

https://blogs.technet.com/b/privatecloud/archive/2013/11/20/troubleshooting-windows-azure-pack-amp-usage-part-1.aspx

Troubleshooting Windows Azure Pack & Usage (Part 2)

https://blogs.technet.com/b/privatecloud/archive/2013/11/21/troubleshooting-windows-azure-pack-amp-usage-part-2.aspx

Configuring VMM and OM for IaaS usage and metering

https://blogs.technet.com/b/privatecloud/archive/2013/09/27/configuring-vmm-and-om-for-iaas-usage-and-metering.aspx

Read my favorites blogs:

Disk Read Error when migrating virtual machine from one cluster to another

Step by step guide for upgrading Active Directory from Microsoft Windows 2008 R2 to Microsoft Windows Server 2012 R2

ADFS and SAP Integration

M. Omer Siddiqui — Fri, 31 Jul 2015 07:58:22 GMT

In a recent project I was working on ADFS with multiple applications and customer also had SAP to be integrated with ADFS. Its quite simple, you have to just import SAP metadata into relying party trust and then map Name ID on the SAP side to the SamAccountName on the ADFS side and it works.

Read my favorites blogs:

Disk Read Error when migrating virtual machine from one cluster to another

Step by step guide for upgrading Active Directory from Microsoft Windows 2008 R2 to Microsoft Windows Server 2012 R2

https://blogs.technet.com/b/exchange/archive/2015/06/19/ask-the-perf-guy-how-big-is-too-big.aspx

Exchange team blog on How big is too big

M. Omer Siddiqui — Tue, 30 Jun 2015 08:17:06 GMT

Recently Exchange team has written an excellent article on Exchange processor and memory usage and how much of these resources should be used as many of the customers are willing to use extremely big hardware for Exchange.

Review the article at:

Ask the Perf Guy: How big is too BIG?

Read my favorites blogs:

Disk Read Error when migrating virtual machine from one cluster to another

Step by step guide for upgrading Active Directory from Microsoft Windows 2008 R2 to Microsoft Windows Server 2012 R2

https://blogs.technet.com/b/exchange/archive/2015/05/05/exchange-server-2016-architecture.aspx

Microsoft Exchange 2016 Initial outline

M. Omer Siddiqui — Tue, 12 May 2015 23:18:05 GMT

Microsoft has recently released an initial look at Exchange 2016 architecture and Exchange team has written an excellent article which provides an initial (subject to change) view of the architecture.

This architecture is described at:

Exchange Server 2016 Architecture

Read my favorites blogs:

Disk Read Error when migrating virtual machine from one cluster to another

Step by step guide for upgrading Active Directory from Microsoft Windows 2008 R2 to Microsoft Windows Server 2012 R2

https://blogs.office.com/2015/04/15/office-365-now-supports-larger-email-messages-up-to-150-mb/

Microsoft Exchange team blog about Large message sizes in Office 365

M. Omer Siddiqui — Fri, 24 Apr 2015 11:17:08 GMT

Recently Microsoft Exchange team has written a blog about large messages in Office 365. I see many customers asking for bigger message size like 100MB and should review this blog.

Office 365 now supports larger email messages—up to 150 MB

Read my favorites blogs:

Disk Read Error when migrating virtual machine from one cluster to another

Step by step guide for upgrading Active Directory from Microsoft Windows 2008 R2 to Microsoft Windows Server 2012 R2

Missing SPN causing domain replication issues

M. Omer Siddiqui — Tue, 24 Mar 2015 00:06:37 GMT

I was recently working with a customer where one of their Active Directory would not replicate. They were receiving Event ID 1645 in their Event logs:

Event Type: Error
Event Source: NTDS Replication
Event Category: Replication
Event ID: 1645
Date: 2/12/2015
Time: 11:12:15 AM
User: Everyone
Computer: DC-04
Description:
The Directory Service received a failure while trying to perform an authenticated RPC call to another Domain Controller. The failure is that the desired Service Principal Name (SPN) is not registered on the target server. The server being contacted is 3cb25b0f-3809-48fb-8571-59f4a2253846._msdcs.contoso.com. The SPN being used is E3514235-4B06-11D1-AB04-00C04FC2DCD2/3cb25b0f-3809-48fb-8571-59f4a2253846/contoso.com@contoso.com.
Please verify that the names of the target server and domain are correct. Please also verify that the SPN is registered on the computer account object for the target server on the KDC servicing the request. If the target server has been recently promoted, it will be necessary for knowledge of this computer's identity to replicate to the KDC before this computer can be authenticated.

We first identified the domain controller, you can do so by pinging the DNS URL in the Event 1645

C:\>ping -a 3cb25b0f-3809-48fb-8571-59f4a2253846._msdcs.contoso.com
Pinging DC-01.contoso.com [10.1.2.3] with 32 bytes of data:
Reply from 10.1.2.3: bytes=32 time<10ms TTL=128
Reply from 10.1.2.3: bytes=32 time<10ms TTL=128
Reply from 10.1.2.3: bytes=32 time<10ms TTL=128
Reply from 10.1.2.3: bytes=32 time<10ms TTL=128
Ping statistics for 10.1.2.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

Then we ran Setspn to add the missing SPN for DC-01. Add the replication SPN in the following form

setspn -A E3514235-4B06-11D1-AB04-00C04FC2DCD2/GUID_of_the_NTDS_settings_object/DNS_name_of_the_domain Name_of_the_domain_controller

Once we added the SPN, it starts to replicate fine and within few minutes, it was up to date.

Read my favorites blogs:

Disk Read Error when migrating virtual machine from one cluster to another

Step by step guide for upgrading Active Directory from Microsoft Windows 2008 R2 to Microsoft Windows Server 2012 R2

Protecting all Organizational Units (OUs) from accidental deletion

M. Omer Siddiqui — Sun, 15 Feb 2015 10:09:22 GMT

You can protect your organizational Units from accidental deletion by using Power Shell scripts to apply the protection to many organizational units at once. You can run these Power shell commands by running the Active Directory Module for Windows PowerShell as Administrator and making sure that you have Domain Admins or Enterprise Admins rights.

First type the following command to check which OUs are not protected:

Get-ADOrganizationalUnit -filter * -Properties ProtectedFromAccidentalDeletion | where {$_.ProtectedFromAccidentalDeletion -eq $false} | ft

Type the following command to protect the OUs that you have identified in the above command:

Get-ADOrganizationalUnit -filter * -Properties ProtectedFromAccidentalDeletion | where {$_.ProtectedFromAccidentalDeletion -eq $false} | Set-ADOrganizationalUnit -ProtectedFromAccidentalDeletion $true

After this command is successfully completed, you can re-run the first command to make sure that all Organizational Units (OUs) have been protected.

Read my favorites blogs:

Disk Read Error when migrating virtual machine from one cluster to another

Step by step guide for upgrading Active Directory from Microsoft Windows 2008 R2 to Microsoft Windows Server 2012 R2

https://blogs.technet.com/b/omers/archive/2010/06/30/step-by-step-guide-for-upgrading-active-directory-from-microsoft-windows-2003-to-microsoft-windows-server-2008.aspx

Step by step guide for upgrading Active Directory from Microsoft Windows 2008 R2 to Microsoft Windows Server 2012 R2

M. Omer Siddiqui — Sun, 08 Feb 2015 11:14:36 GMT

Sometime ago, I wrote a blog about upgrading from Windows 2003 based Active Directory to Windows 2008 R2 based Active Directory. If you are planning to upgrade now from Windows Server 2008 R2 based Active Directory to Windows Server 2012 R2 based Active Directory, the steps are the same and you can found them at my earlier blog.

Step by step guide for upgrading Active Directory from Microsoft Windows 2003 to Microsoft Windows Server 2008

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Disk Read Error when migrating virtual machine from one cluster to another

Appear Offline in Microsoft Office Communicator Server 2007