With a hybrid Exchange Online deployment, where you have Exchange Server on-premises and Exchange Online configured in the cloud, and utilising AADConnect to synchronize the directories, you should never find that a synced user object is configured as both a mailbox in Exchange Online and a mailbox on-premises. When Active Directory is synced to Azure… Continue reading Duplicate Exchange Online and Exchange Server Mailboxes
Category: Exchange Server
Conversation Red Number in Skype For Business That Won’t Go Away
I have had this issue for ages, but could not find any answer for it on the internet that did not involve resetting Skype for Business or other complex stuff when in fact the answer is so easy it hurts! Finding it was one of those Duh! moments. You have this: Skype for Business shows… Continue reading Conversation Red Number in Skype For Business That Won’t Go Away
Office 365 and ACDC
The best connectivity to Office 365 is achieved with local internet breakout and local DNS egress. This means things like each branch office should connect directly to the internet and not via the Head Office and then to the internet and that DNS lookups are done local as well. The reason for DNS lookups is… Continue reading Office 365 and ACDC
DMARC Quarantine Issues
I saw the following error with a client the other day when sending emails from the client to any of the Virgin Media owned consumer ISP email addresses (virginmedia.com, ntlworld.com, blueyonder.com etc.) mx3.mnd.ukmail.iss.as9143.net gave this error:vLkg1v00o2hp5bc01Lkg9w DMARC validation failed with result 3.00:quarantine In the above, the server name (…as9143.net) might change as will the value… Continue reading DMARC Quarantine Issues
On-Premises Public Folders, Exchange Online, And Multiple Forests
Update: October 2018. Microsoft have added support to hide public folders in Exchange Online. Now rather than the below post from me, you can set a users mailbox to see public folders or not as required and then enable the global setting to turn on controlled access to public folders. For more see https://techcommunity.microsoft.com/t5/exchange-team-blog/announcing-support-for-controlled-connections-to-public-folders/ba-p/608591 … Continue reading On-Premises Public Folders, Exchange Online, And Multiple Forests
Forcing Transport Level Secure Email With Exchange Online
In Exchange Online there are a few different options for forcing email to require an encrypted connection. These depend upon the level of licence you have, and some of them are user based (Office 365 Message Encryption for example), but there are two ways to force TLS (transport layer security) for the email between when… Continue reading Forcing Transport Level Secure Email With Exchange Online
XOORG, Edge and Exchange 2010 Hybrid
So you have found yourself in the position of moving to Exchange Online from a legacy version of Exchange Server, namely Exchange 2010. You are planning to move everyone, or mostly everyone to Exchange Online and directory synchronization plays a major part (can it play a minor part?) in your plans. So you have made… Continue reading XOORG, Edge and Exchange 2010 Hybrid
Capax Zantas EAS EWS 501 Errors
Whilst load balancing Exchange 2013 with a Capax Zantas EAS deployment in place I was reminded of an issue I experienced a few years ago with a Kemp load balancer. The EAS app for OWA was failing with various errors such as: Communication with service failed. The service might be down or misconfigured. Error code:… Continue reading Capax Zantas EAS EWS 501 Errors
Photos, Exchange, And The File System
On an Exchange 2013 and later server this is a folder called photos that gets created after installation and can contain a couple of user photos for some of your users. How does it get there and what does it contain? The photos folder appears (on 2016 anyway) when the user uploads a photo (via… Continue reading Photos, Exchange, And The File System
Exchange Online Archive–Counting Archives
If you are using Exchange Online Archive and what to get a count of the number of users with an archive, or a list of the users with an archive, then the following PowerShell scripts will give you this info: List all users with an Exchange Online Archive: Get-MailUser -ResultSize Unlimited | where {$_.ArchiveName -ilike… Continue reading Exchange Online Archive–Counting Archives
Exchange Server and Missing Root Certificates
I came across an issue with a clients Exchange Server deployment today that is not well documented – or rather it is, but you need to know where to look. So I thought I would document the troubleshooting steps and the fix here. We specifically came across this error when testing Free/Busy for an Office… Continue reading Exchange Server and Missing Root Certificates
Exchange 2013 Partner Applications and Error 2008
When Exchange Server 2013 is configured to connect to Lync / Skype for Business Server one of the steps is to create a partner application. When this is first run the partner application stores the certificate presented by Lync Server in the Active Directory configuration partition. If the certificate changes on the Lync Server then… Continue reading Exchange 2013 Partner Applications and Error 2008
Qualifications in Exchange Signatures
In a recent project I was working with iQ.Suite from GBS and specifically the component of this software that add signatures to emails. The client are an international organization with users in different geographies and we needed to accommodate the users qualifications in their email signature. The problem with this is that in Germany qualifications… Continue reading Qualifications in Exchange Signatures
DLP Templates
At the Microsoft Exchange Conference 2014 in Austin, Texas I ran a session on DLP templates. This blog post was linked from the slides and contains the examples I used in the session. To download any of the samples click the links below: ContosoPharma.xml – the DLP data classification file to add the ability to detect… Continue reading DLP Templates