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  • Blog Post: Exchange Server 2016 Architecture

    Exchange Server 2016 builds upon the architecture introduced in Exchange Server 2013 , with the continued focus goal of improving the architecture to serve the needs of deployments at all scales. Important : This article contains preliminary information that may be changed prior to final commercial...
  • Blog Post: Exchange 2013 and Exchange 2010 Coexistence with Kerberos Authentication

    In April 2011, I documented our recommendation around utilizing Kerberos authentication for MAPI clients to address scalability limits with NTLM authentication. The solution leverages deploying an Alternate Service Account (ASA) credential so that domain-joined and domain-connected Outlook clients, as...
  • Blog Post: Configuring Multiple OWA/ECP Virtual Directories on the Exchange 2013 Client Access Server Role

    We have previously published guidance for setting up multiple OWA and ECP virtual directories for Exchange Server 2007 and 2010, and now it is the turn of Exchange Server 2013. The eagle eyed amongst you may spot some copy and paste from previous blogs on the subject, and well frankly, you’d be correct...
  • Blog Post: Using an Azure VM as a DAG Witness Server

    I’m happy to announce support for use of an Azure virtual machine as an Exchange 2013 Database Availability Group witness server. Automatic datacenter failover in Exchange 2013 requires three physical sites, but many of our customers with stretched DAGs only have two physical sites deployed today. By...
  • Blog Post: On-Premises Legacy Public Folder Coexistence for Exchange 2013 Cumulative Update 7 and Beyond

    What are we talking about today? In Exchange 2013 CU5 (yes 5, V, cinco, fem, and cinque) we started implementing changes to how Legacy Public Folder endpoint discovery will be performed by Outlook (for Windows) in the future. This work continues behind the scenes and will be completed with the release...
  • Blog Post: OAB Improvements in Exchange 2013 Cumulative Update 7

    Note : Cumulative Update 7 (CU7) for Exchange Server 2013 will be released soon TM . Back in May , I discussed the changes we introduced in Exchange 2013 Cumulative Update 5. Specifically with CU5 and later, an OAB can only be assigned (or linked) to a single OAB generation mailbox. This architectural...
  • Blog Post: Come get your Calculator Updates!

    Today, we released updated versions of both the Exchange 2010 Server Role Requirements Calculator and the Exchange 2013 Server Role Requirements Calculator . The Exchange 2010 version is an incremental update and only includes minor bug fixes. You can view what changes have been made, or download the...
  • Blog Post: Site Resilience Impact on Availability

    This article continues the analysis I started in my previous article, DAG: beyond the “A” . We all understand that a good technology solution must have high levels of availability, and that simplicity and redundancy are the two major factors that drive solution availability. More specifically...
  • Blog Post: OAB Improvements in Exchange 2013 Cumulative Update 5

    Cumulative Update 5 (CU5) for Exchange Server 2013 will be released soon TM , but before that happens, I wanted to make you aware of a behavior change in the Offline Address Book that is shipping in CU5. Hopefully this information will aid you in your planning, testing, and deployment of CU5. The Offline...
  • Blog Post: The Preferred Architecture

    During my session at the recent Microsoft Exchange Conference (MEC), I revealed Microsoft’s preferred architecture (PA) for Exchange Server 2013. The PA is the Exchange Engineering Team’s prescriptive approach to what we believe is the optimum deployment architecture for Exchange 2013, and...
  • Blog Post: Certificate Planning in Exchange 2013

    Now that we understand the load balancing and namespace planning principles and how clients connect in an Exchange 2013 environment that has Exchange 2007 and/or Exchange 2010 deployed, the proper certificates can be constructed and deployed as part of the upgrade process. Of course it goes without saying...
  • Blog Post: Client Connectivity in an Exchange 2013 Coexistence Environment

    This article is part 3 in a series that discusses namespace planning , load balancing principles , client connectivity, and certificate planning. Over the last several months, we have routinely fielded questions on how various clients connect to the infrastructure once Exchange 2013 is deployed. Our...
  • Blog Post: Exchange 2003 migration toolkit

    Microsoft Exchange Server 2003 entered the market on September 28, 2003 and continued the great messaging and collaboration experience that Microsoft Exchange Server had provided in previous releases. As we approach April 8, 2014, we want to inform users of Microsoft Exchange Server 2003 of the opportunities...
  • Blog Post: Now Available: GetLogFileUsage.ps1 script

    Whether you’re using the Exchange Server Role Requirements Calculator by Ross Smith IV or the Exchange Client Network Bandwidth Calculator by Neil Johnson, you’ll need to provide statistics about your log file usage to determine bandwidth requirements. Whenever I’ve done that previously...
  • Blog Post: Namespace Planning in Exchange 2013

    A while back we promised an article on namespace planning and load balancing principles with Exchange 2013. We’re finally going to fulfill that promise as a series of articles. The articles will span several topics, including namespace planning, load balancing , client connectivity coexistence , and...
  • Blog Post: Load Balancing in Exchange 2013

    This article is part 2 in a series that discusses namespace planning , load balancing principles, client connectivity , and certificate planning. Load Balancing Unlike previous versions of Exchange, Exchange 2013 no longer requires session affinity at the load balancing layer. To understand...
  • Blog Post: Exchange 2010 High Availability Misconceptions Addressed

    I’ve recently returned from TechEd North America 2011 in Atlanta, Georgia, where I had a wonderful time seeing old friends and new, and talking with customers and partners about my favorite subject: high availability in Exchange Server 2010. In case you missed TechEd, or were there and missed some...
  • Blog Post: Combining Web Farm publishing with Software or Hardware Based Load Balanced CAS arrays

    In my post just the other day I provided a link to the new guide covering Exchange publishing via Forefront TMG or UAG. One poster followed up by asking, “How do I set things up when I have both TMG/UAG with a web farm and a hardware load balancer?” It’s a great question, as these days hardware load...
  • Blog Post: Analyzing Exchange Transaction Log Generation Statistics

    Download Overview When designing a site resilient Exchange Server solution, one of the required planning tasks is to determine how many transaction logs are generated on an hourly basis. This helps figure out how much bandwidth will be required when replicating database copies between sites...
  • Blog Post: Exchange 2013 Server Role Architecture

    The Past: Exchange 2007 and Exchange 2010 In 2005, we set out developing Exchange 2007. During the preliminary planning of Exchange 2007, we realized that the server architecture model had to evolve to deal with hardware constraints, like CPU, that existed at the time and would exist for a good portion...
  • Blog Post: Exchange Advice Video – YOUR Advice

    You hear from us pretty often. While we absolutely want you to read Ross’ blog and factor in transaction log space in your capacity planning or listen to Perry talk about how we’ve shifted to a services culture , we like hearing from you too. As part of our Exchange Ideas video series, we asked some...
  • Blog Post: Designing a Highly Available Database Copy Layout

    Update 10/21/11 : To read the related TechNet documentation, please go here , here and here . Exchange 2010 introduced the database availability group (DAG), which enables you to design a mailbox resiliency configuration that is essentially a redundant array of independent Mailbox servers. Multiple...
  • Blog Post: Database Maintenance in Exchange 2010

    Over the last several months there has been significant chatter around what is background database maintenance and why is it important for Exchange 2010 databases. Hopefully this article will answer these questions. What maintenance tasks need to be performed against the database? The following...
  • Blog Post: Exchange 2010 Service Pack 2 and Hosting

    With the changes in strategy we announced in Future of /Hosting Mode a few months back we wanted to take the opportunity to make clear what is supported in what are typically referred to as hosting scenarios. We announced that hosters would be able to use Exchange 2010 SP2 to provide hosted Exchange...
  • Blog Post: Update on Multi-Mailbox Search Licensing

    Earlier this month we announced a change on this blog related to licensing for Multi-Mailbox Search . Since then we’ve received questions about when it’ll go into effect. The change will go into effect starting October 1, which is when it’ll be reflected in the product use rights (PUR). The PUR contain...