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18/04/2015

IIS Exploit can reboot your Windows Server; install patch KB3042553 ASAP

This week Microsoft release a patch for Windows 7/Windows Server 2008 R2 and up that fixed a critical remote execution bug, see MS15-034 and CVE-2015-1635 for more info. Unfortunately the patch was reversed engineered and now an exploit is available. This was detected and described by ISC SANS. They added Denial of Service (DoS) as possible impact, next to Remote Code Execution....
Categories Issue/Security/Update Comments: 0
19/02/2015

Issues with Unified Contact Store in combination with Lync on-premises and Exchange Online

I’ve encountered an issue that popped up while I was testing a move from Exchange On-premises to Exchange Online (EXO) while Lync Server 2013 remained on-premises due to Enterprise Voice. Outlook Web Access (OWA) from Exchange Online can be integrated with on-premises Lync, this way OWA users can see presence and have limited IM functionality just like what’s possible if...
Categories Exchange 2013/Issue/Lync/Office 365/OWA Comments: 3
13/02/2015

Some things to do after leaving Windows Server 2003 (from an Exchange perspective)

Today the Exchange Team blog posted an article about upgrading the Domain Functional (DFL) level of your Active Directory environment away from Windows Server 2003 and the fact that raising the level might have some impact on your Exchange servers (and other applications). It is possible that they might not be able to authenticate. If you do run into issues after...
Categories Active Directory/Exchange/Issue/Support/Update Comments: 0
14/01/2015

Do not update your Office Web Apps Server with automatic updates

Although it is not exactly required to deploy with Exchange Server 2013, Office Web Apps Server (OWAS or also referred to as WAC server) provides a more user friendly experience instead of the standard Web Preview. For Lync Server 2013 it’s a requirement if you want to be able to present PowerPoint files in a conference. And well, for SharePoint...
Categories Exchange 2013/Issue/Lync/Management/Question of the day/Update Comments: 0
26/08/2014

Mail enabled Public Folders on Exchange 2013 CU6 require action for internet mail to be received

So, CU6 is out. It’s easy to overlook the change mentioned within the Exchange 2013 Release Notes. And you might have missed the Exchange Team blog post about all Public Folder changes with CU6. And it might not be relevant for your situation. But I know certain customers rely on mail enabled Public Folders that are able to receive internet...
Categories Exchange 2013/Issue/Update Comments: 0
13/08/2014

Optimizing the Outlook AutoDiscover process by skipping the root domain query

Updated 8/15/2014: see the bottom of this article for additional information on changed AutoDiscover behavior of Outlook 2013. Consider the following scenario: An Active Directory (AD) domain named equal to the SMTP Suffx, so the mailaddress dmstork@contoso.com in the contoso.com AD domain. No on-premises Exchange, this means that there is no Service Connection Point (SCP) in A. Outlook 2013 (or lower...
Categories Exchange/Issue/Office 365/Outlook clients Comments: 3
05/06/2014

Office 365 users can’t see free/busy of on-premises users

The past few days I was working on making an on-prem Exchange Server 2013 SP1 environment hybrid with the Office 365 tenant. You would expect that running the Hybrid Configuration Wizard (HCW) would be it, after setting all the requirements as they should. Unfortunately after running the HCW, Office 365 mailboxes couldn’t access free/busy information of on-prem mailboxes. The other...
Categories Exchange/Exchange 2013/Issue/Office 365 Comments: 0
21/03/2014

Updated – Exchange 2013 DAG, Windows Server 2012 R2 and VMware vSphere? Check support!

UPDATED 28/3/2024: See update below article. A little heads up. While working on an extensive design including Exchange Server 2013 with Service Pack 1 installed on Windows Server 2012 R2, my eye caught a comment in the Facebook group Exchange Server 2013 (Facebook login required). VMwares vSphere 5.1 and higher are shown to be validated by Microsofts Server Virtualization Validation...
Categories Exchange 2013/High Availability/Issue/Support Comments: 0
25/09/2013

Failed Exchange Server 2013 CU2 & CU3 install due to security update 2874216 (updated again)

Today a customer asked for my help because an installation of Exchange Server 2013 Cumulative Update 2  (v2) had failed; Their Exchange environment didn’t work anymore and they were stuck. During the installation from Cumulative Update 1 (CU1) to Cumulative Update 2 (CU2), they encountered the following error: Error: Unable to remove product with code 4934d1ea-be46-48b1-8847-f1af20e892c1. Fatal error during installation....
Categories Exchange/Exchange 2013/Issue/Question of the day/Update Comments: 0
23/09/2013

Apple iPhone 5s TouchID and Exchange ActiveSync (updated)

2013/10/17: Added support statement by Microsoft below Just today I was curious how the Apple biometric convenience solution TouchID on the iPhone 5s would impact password policies enforced by Exchange ActiveSync(EAS). I frequently run into complaints from Android users who previously used a Pattern Lock instead of a PIN to unlock their phones. When my EAS policy sets specific password...
Categories ActiveSync/Exchange/Exchange 2010/Exchange 2013/Issue/Question of the day/Security/Windows Phone / Mobile Devices Comments: 0
28/05/2013

Exchange 2013 OWA Mailbox policy issue cause of OWA error?

Within Exchange 2013 you can have OWA (Outlook Web App) Mailbox policies, in which an Exchange Admin can determine which features within OWA are available to users. By default, there’s a default policy with all options enabled, but you can have more policies and configure them at will and assign them to Mailbox-enabled users according to the organization’s needs. In this case...
Categories Exchange 2013/Issue/OWA/Unified Messaging Comments: 0