How to change the primary SMTP address of an Exchange Online mailbox in a Hybrid environment

Edit:  I’ve posted a video of this here

In a hybrid environment, when a mailbox is migrated from on-premise to Exchange online, it will retain its primary SMTP email address.  But what about when you create a new user who has never had a mailbox on-premise?

When you assign an Office 365 license, and a mailbox is created, you might find that the primary email address is set to the Microsoft Online Email Routing Address (e.g. read more

Ambigous URL’s prevent Exchange 2013 proxy to 2010

I was recently working on a project migrating a customer from MS Exchange 2010 to MS Exchange 2013.  We were preparing to cutover the client access namespace to 2013 by updating DNS to point at the 2013 CAS.


However, during testing, I found that 2013 was not proxying connections to mailboxes on 2010. My outlook client would remain in a disconnected state. read more

Azure Active Directory Sync (aka DirSync) OU Filtering “missing-partition”

Problem:  DirSync OU Filtering – missing-partition-for-run-step dirsync

In this blog I am not going to describe how to configure DirSync OU filtering.  You can find a great description of how to do that very thing here.

In this blog I am going to describe how I resolved the following error while configuring DirSync OU filtering read more

Access Denied” connecting to Office365 using Remote Powershell

Connecting to Exchange Online using Remote Powershell as per this procedure I was getting the following “Access Denied” error


As per KB2905767 I logged into the Office 365 portal and verified the password was correct and that the account was a global admin.


I my case I was copying and pasting the username read more

Changing the default Office365 Windows Azure Active Directory Sync Schedule

The default synchronization schedule between On-premise and Office 365 is 3 hours.


As per this technet article:

·         It is unsupported to synchronize more frequently than the default 3 hours

If you wanted to change the default sync period then

  • Navigate to the Window Azure Active Directory Sync directory on the server where the tool is installed
  • Open the following file in notepad –  Microsoft Online.DirSync.Scheduler.exe.config
  • DirSyncDirectory
  • Adjust the setting <add key=”SyncTimeInterval” value=”3:0:0″ />
  • DirSyncConfigFile
    1. For example if you wanted to bring this down to 15 minutes then change this line to the following. <add key=”SyncTimeInterval” value=”0:15:0″ />
    2. read more