UPN Matching for Office 365

This past month I was tasked with integrating an on premises Active Directory (AD) and Exchange environment with an existing Office 365 tenant.  The difference between this project and all of the others I’d previously performed is that the customer’s Office 365 tenant only had a subscription for Office 365 ProPlus and the default domain was being…

Issues with Upgrading to AAD Connect 1.1.524.0

On 15 May 2017, the latest version of AAD Connect (1.1.524.0) was released.  If you were not aware, when AAD Connect is upgraded to this version, the sync cycle may get set to “False” AAD Connect will not sync to O365. In the past week, I’ve upgraded AAD Connect from varying versions to version 1.1.524.0…

References: Dynamic Distribution Groups and Exchange Hybrid

Below are several references about how dynamic distribution groups should be set up to work with Office 365 and Exchange in a hybrid configuration… Office 365 – Dynamic Distribution Groups in Exchange Hybrid Mystery of Dynamic Distribution Lists Exchange Hybrid Office 365 and Dynamic Distribution Groups in Hybrid Exchange Deployments Configure Dynamic Distribution Groups in a Hybrid Deployment…

Unable to Delete Mailbox Database

Recently, while decommissioning an Exchange 2013 server after a migrating from Exchange 2007 to Exchange 2013 and then to Exchange 2016, I received a familiar error when attempting to remove the last database from Exchange 2013 (see references at end of article). This mailbox database contains one or more mailboxes, mailbox plans, archive mailboxes, public folder mailboxes…

References: Exchange Back Pressure

References: Exchange Back Pressure Understanding Back Pressure (TechNet) Uncover Exchange back pressure triggers with PowerShell A Guide to Back Pressure in Microsoft Exchange Server (Exchange Server Pro) Back Pressure in Exchange 2010 (MSExchange.org) Back Pressure: Moving the queue database in Exchange 2007 (Petri) If you have a reference that has helped you identify and resolve…