Category: Exchange migrations

Convert Mailbox to Linked Mailbox

17th July, 2015

When performing an AD migration it is sometimes necessary to make the mailbox a linked mailbox so that the migrated user can continue to use their email.  When searching online I found the official answer from Microsoft which is to disable-mailbox and then connect-mailbox, however this loses all of the Exchange related attributes.  Of course you […]

Merge a MailContact with a User

2nd July, 2015

Often when doing migrations some form of GalSync has taken place or where admins have manually created mailcontacts in the opposite Exchange Org to assist with coexistence.  However when it comes time to do the migration the Prepare-MoveRequest.ps1 it will convert the MailContact into a MailUser and ensure it has the mailboxGUID and other attributes […]

Convert Mailbox to Mailuser

26th June, 2015

I was asked to convert a mailbox to a mailuser, and funny enough although the reverse is true, you can’t just call enable-mailuser on a mailbox… Of course you can disable-mailbox and then enable-mailuser but that removes all Exchange related attributes, which isn’t really that desirable.  To overcome this I wrote a small script that […]

Deleting Folders

3rd June, 2015

from an Exchange Mailbox with PowerShell I was given an escalation at a client where somehow a user managed to create thousands of folders all nested one inside the other.  So the task was how to delete these folders. User and 1/2/3rd line support had already tried using Outlook, OWA and MFCMapi but none of […]

Sending TLS mail to Exchange from the command line

29th May, 2015

Before we look at sending TLS mail to Exchange, let’s talk about using a command line to send mail without TLS. The command you use to send plain email to Exchange is the telnet client.  It is no longer installed by default but you can install it by adding the Windows Feature for telnet client.  Once […]

Demystifying AD Schema Extensions for Exchange

22nd May, 2015

Now most people who have been around Active Directory (AD) will understand about the AD schema and that some applications like Exchange, Lync, etc make updates to this schema.  However not everyone is intimately familiar with AD, so let’s start at the beginning… Active Directory 101 Microsoft introduced Active Directory back in the Windows 2000 […]

The Shared Mailbox Dilemma

24th April, 2015

The Shared Mailbox Dilemma Microsoft Teams (and Office 365 Groups) whilst having gained serious traction, and by serious – Teams has become Microsoft’s fastest growing App in their history. Shared Mailboxes still have a place in our heart and in the organisation for now, but inevitably they will perhaps fade away, maybe even email will […]

Design for an enterprise scale Exchange 2013 OAB

17th April, 2015

Today we will be discussing how to design your Exchange 2013 Offline Address Book (OAB) for an enterprise scale client.  By enterprise scale client we mean a client with thousands of mailboxes spread over multiple Active Directory sites. See our previous post “Exchange Global Address List and the Outlook Offline Address Book” to clear up any […]

Least access model

11th April, 2015

for Lotus Notes to Exchange data migrations In many organisations to achieve accessing mail data for a migration you add the Lotus Notes Migration ID to the administrators group of the domain(s). However, when requesting 3rd party trusted migration experts like Nero Blanco to perform the migration, you may not like the exposure to data […]

Exchange Global Address List and the Outlook Offline Address Book

2nd April, 2015

Introduction   This document seeks to address and clarify the small misunderstanding surrounding the GAL (Global Address List) and the OAB (Offline Address Book). Quite often all Administrators, even Exchange Administrators simply refer to the users they see in the Address section of Outlook casually as the GAL for ease of reference, but really more […]

Domino Routing Rules – Binary Tree Coexistence Solutions

27th March, 2015

Exchange to Domino Routing Rules specifically relating to Binary Tree Coexistence Solutions Introduction This document seeks to identify the potential pitfalls of Inbound SMTP routing to Domino in a Coexistence environment, particularly when using a static targetAddress that is built by a Directory Synchronisation solution. Routing from Exchange/Office 365 to Domino In a Binary Tree […]

OABGen encountered file error ffffffff

20th March, 2015

The problem started with users reporting that their Offline Address Book (OAB) was missing some recent new starters, actually they said Global Address List (GAL) but that misconception is another story for another day.  Upon investigation it seemed that the issue was a global issue.  So where to start…  I first thought right let’s think through […]