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  • 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: 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 this statement...
  • 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: GAL Photos in Exchange 2010 and Outlook 2010

    Over the years, displaying recipient photographs in the Global Address List (GAL) has been a frequently-requested feature, high on the wish lists of many Exchange folks. Particularly in large organizations or geographically dispersed teams, it's great to be able to put a face to a name for people you...
  • Blog Post: Secure Messaging with S/MIME and OWA on Exchange Server 2007 SP1

    S/MIME support for Exchange Outlook Web Access (OWA) was introduced in Exchange 2003. In Exchange 2007 SP1, we are adding S/MIME support back and making it more reliable and powerful. Below, is a short introduction to S/MIME and simple end-to-end steps for how to use S/MIME with OWA on Exchange Server...
  • Blog Post: EWS CAS to CAS Request Proxying

    In Exchange Server 2007 SP1, the EWS team added a new feature called EWS Request Proxying.  It is sometimes also referred to as EWS Proxy or HTTP Proxy.  Not much has been said about this feature, but if you care about performance, it is important to understand why it is there, why you want...
  • Blog Post: A script to troubleshoot issues with Exchange ActiveSync

    ActiveSyncReport script Download The Exchange support team relatively frequently receives cases where mobile devices using Exchange ActiveSync (EAS) protocol send too many requests to Exchange server resulting in a situation where server runs out of resources, effectively causing a ‘denial...
  • Blog Post: What’s new with Microsoft Remote Connectivity Analyzer? A lot!

    Have you ever gotten a call from someone you know whose Outlook client is having trouble connecting to their email server? Don’t you just wish you had a tool that you could send to them that would walk them through a connectivity test and provide a simple way for them to send the results back to you...
  • Blog Post: ExRCA: Now supporting 10 additional languages

    Last year, we announced the Exchange Remote Connectivity Analyzer and usage continues to grow as people become aware of this web site. Today, we are releasing a new version which will help us reach an even wider audience... We now support 10 additional languages! Here is the list of all the languages...
  • Blog Post: Upgrading Exchange ActiveSync to Exchange 2010

    Many of you have been asking how you can upgrade your existing Exchange environment to Exchange 2010 from a client access perspective. For most of you, this will also mean coexisting with legacy Exchange and Exchange 2010 for a period of time. My first blog article in this series discussed the overall...
  • Blog Post: How Exchange 2007 CAS Proxying works for ActiveSync

    As a last part in my series of posts covering Exchange 2007 CAS Proxying and Redirection (see previous posts here and here ) - I wanted to cover Proxying for ActiveSync. There are three steps involved in handling a request: Determining whether to proxy a given request Proxying the request Causing the...
  • Blog Post: IMAP4 and Exchange 2010 RTM

    I'd like to take the time to highlight the significant improvements in the performance of the Internet Message Access Protocol 4 (IMAP4) in Exchange 2010, and also emphasize the importance of knowing the mailbox size when sizing your Client Access Servers for IMAP4 users. These results, and more details...
  • Blog Post: How Exchange Server 2007 CAS Proxying works for Outlook Web Access (OWA)

    Continuing on my previous post , I wanted to go into explaining how Exchange Server 2007 CAS Proxying works for Outlook Web Access (OWA). Proxying for Outlook Web Access is used when there is only one Internet-facing CAS Server. In this scenario the will be proxied to the CAS server where his mailbox...
  • Blog Post: Steps to manually recreate the sync relationship on mobile devices synchronizing with Microsoft Exchange Server

    Steps to manually recreate the sync relationship on mobile devices synchronizing with Microsoft Exchange Server In some troubleshooting scenarios, users may need to rebuild and resynchronize their partnership manually. In previous versions of Microsoft Exchange Server, if you moved your mailbox...
  • Blog Post: More fun with Logparser and Exchange logs

    Right now there is no easy way to tell who is using Entourage, RPC/HTTP (Outlook Anywhere), Exchange ActiveSync, or OWA with what frequency.  I have found Logparser to be very helpful in answering a lot of these questions.  The tool is a bit intimidating to get started but once you get the...
  • Blog Post: UPDATE 2: Exchange 2007 Processor and Memory Recommendations

    NOTE: This article has also been published in the official Exchange 2007 documentation. We recommend that you check the documentation for the most up-to-date version. Please see the following links: Planning Processor Configurations - http://technet.microsoft.com/en-us/library/aa998874.aspx Planning...
  • Blog Post: Exchange 2007 SP3 and OWA S/MIME Version Mismatch

    In the recently released Exchange 2007 Service Pack 3, there’s a version mismatch between the Outlook Web Access (OWA) S/MIME Control, an Active X control used to provide S/MIME support in OWA. After you install SP3, users who have the control installed will get prompted to install the latest version...
  • Blog Post: How to Configure the Availability Service for Cross-Forest Topologies

    The Availability service improves information workers' calendaring and meeting scheduling experience by providing secure, consistent, and up-to-date free/busy information. By default, this service is installed with Microsoft Exchange Server 2007. In cross-forest topologies where all connecting client...
  • Blog Post: EMC and certificates with failed revocation checks in Exchange 2010

    Starting with Exchange Server 2007, we added protection for Exchange data paths to Client Access Servers using SSL . SMTP communication between transport servers is also protected using TLS . To ensure this protection is enabled out-of-the-box, Exchange setup creates self-signed certificates and enables...
  • Blog Post: Managing OAB in Exchange Server 2013

    The Exchange team blog article OAB in Exchange Server 2013 introduced the new Offline Address Book (OAB) generation and distribution architecture in Exchange Server 2013. Take a few moments to visit the article if you haven’t seen it yet or re-visit it for a quick refresher. The OAB management...
  • Blog Post: Outlook Anywhere changes in Exchange Server 2007 SP1

    In Exchange Server 2007 SP1, the configuration of Outlook Anywhere (formerly known as RPC over HTTP) has been changed to accommodate the different ways Exchange CAS servers are deployed on the Internet. This blog post provides an overview of these changes. Exchange 2007 RTM In Exchange 2007 RTM, enabling...
  • Blog Post: Ask The Exchange Perf Guy: How do large item counts & IMAP clients affect CAS CPU in Exchange 2007?

    We recently updated our maximum item count guidance for Exchange 2007 when IMAP clients are being used. As a result, I've gotten a number of questions about the reasons for the change. Hopefully this post will help to answer those questions. In Exchange 2007, the product went through some major architectural...
  • Blog Post: Office 365 – Password Expiration Notifications in Outlook

    The Microsoft Outlook team has released updates for Outlook 2010 and 2007 that provide Office 365 users with password expiration notifications. The advance password expiry notification will be displayed in a pop-up message (near the system clock) within a certain time period before their password actually...
  • Blog Post: How to Configure Certificate Based Authentication for OWA - Part I

    Lately we have seen more interest in certificate based authentication with Exchange 2007 Outlook Web Access. Using certificates for authentication can be considered more secure because a user cannot gain access to the mailbox simply by knowing the user name and password. The certificate option prevents...