Category Archives: Exchange Server

How to extract a list of mailboxes from an Exchange mailbox migration batch

Actually, this is more of a question than answer – although I have an answer of sorts, albeit far from elegant. I’ve been scheduling some batch onboarding mailbox migrations from a hybrid environment with Exchange 2010 to Exchange Online.  The batch process is pretty straightforward, but I haven’t found an easy way to dump the… Read More »

Anyone remember Exchange and X.400?

You know you’re getting old when you come across a Usenet post you wrote almost 20 years ago. I came across this little memento while Googling for a much more recent item. Given the vintage of the post, I must have been referring to Exchange 4.0.  Exchange has come a long way since then, although… Read More »

EOP Accepted Domain silently modified

It seems that a couple of weeks ago my standalone Exchange Online Protection (EOP) configuration was changed without me being involved. Basically, it looks like my default Accepted Domain was changed from type “Internal Relay” to “Authoritative” without my knowledge or consent. The first I knew of this was when I noticed my on-premises mail… Read More »

MSExchange Mailbox Replication Error 1121

I recently had a interesting issue where I was seeing the 1121 error below in the Application log on one of my Exchange 2013 servers every minute.   Log Name: Application Source: MSExchange Mailbox Replication Date: 14/01/2015 2:23:34 p.m. Event ID: 1121 Task Category: Request Level: Error Keywords: Classic User: N/A Computer: Description: The… Read More »

[ERROR] Could not find the Exchange Mailbox Administrators Universal Security Group through its well-known GUID

I came across a weird error the other day while running Exchange Server 2013 CU6 setup with the /PrepareAD switch.  The error (from the Exchange setup logs) was this: [12/02/2014 01:14:16.0727] [2] [ERROR] Could not find the Exchange Mailbox Administrators Universal Security Group through its well-known GUID 29a962c2-91d6-4ab7-9e06-8728f8f842ea.  Please make sure that Setup /prepareAD has… Read More »

SPF records and Exchange Online Protection

  You might come across a slight gotcha with SPF records if are using Exchange Online Protection (EOP) to provide protection for your on-premises mail environment and you don’t need to use EOP to scan your outbound (i.e. on-premises to Internet) messages. If this scenario is of interest to you, read on… You may be… Read More »

How to change the Exchange 2013 OAB Generation Schedule

To be honest I’m only writing this one because I know I’ll get confused in the future and will want to refer to something authoritative. 🙂 There are two configurable values when considering how to change the Exchange Server 2013 Offline Address Book (OAB) generation schedule from its default of 1 day.  These are: OABGeneratorWorkCycle… Read More »