Exchange and the LegacyExchangeDN Problem
Sep07

Exchange and the LegacyExchangeDN Problem

KB ID 0001468 Problem Why do we have the Exchange LegacyDN? It’s a throwback, from a time when we had our users, and our mail users in different databases. Below you can see the ExchangeLegacyDN for this Exchange on-premise user; /O=First Organisation/OU=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn={something-user-specific} Who cares? Well they are still important, if you send an internal email (to someone in...

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Forward Mail From Exchange (On-Prem) To Office 365
Sep06

Forward Mail From Exchange (On-Prem) To Office 365

KB ID 0001467 Problem WARNING: Do not do this, if you are carrying out a Hybrid migration to Office 365! I’ve been doing an On-Prem to Office 365 migration recently. It was a little unusual because the ‘on-prem’ Exchange was not in the clients domain. So rather than migrate all the mail to their domain, and them migrate it to Office 365  we chose to use a third party migration solution ODME (Quest On Demand Migration...

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Office 365: Grant a User Full Mailbox Access to all Mailboxes
Sep02

Office 365: Grant a User Full Mailbox Access to all Mailboxes

KB ID 0001466 Problem Obviously there are some security concerns about having a user with full mailbox access to all mailboxes! But that aside, I was using a third party Migration tool last week, and it needed to connect to every mailbox with full access rights to perform the migration. So this is how I did it; Solution Firstly you need to connect to your Office 365 tenant with PowerShell; Connect to Office 365 Exchange PowerShell Now...

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O365: Enable Application Impersonation
Jul23

O365: Enable Application Impersonation

KB ID 0001449 Problem While using a migration tool to do some ‘on-prem’ to Office 365 migrations I had to enable ‘Application Impersonation’ for my Office 365 user. The tool didn’t explain how to do that, so I had to work it out for myself 🙁 So to make things easier for everyone else, here’s how to do it. Solution From within the Office 365 portal > Admin > Exchange. Dashboard > Permissions...

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Migrating Mailboxes From On-Premise to Office 365
Apr03

Migrating Mailboxes From On-Premise to Office 365

KB ID 0001419 Problem This post continues from Part-One where we connected both our domain, and on-premise Exchange server to Office 365. Now we will add our public domain, and migrate our mailboxes. Step 3 Adding Domains to Office 365 Before proceeding you will need administrative access to your public DNS records so you can create new records. Log into Office 365 > Admin Console. Add a domain. Enter your public domain name >...

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Office 365: Migrating To Exchange Online
Apr01

Office 365: Migrating To Exchange Online

KB ID 0001418 Problem This is Part-One of a migration from ‘on-premise’ Microsoft Exchange, to Office 365 (Exchange Online). I’m using my spare ‘test domain’ (.co.uk). And I’m using the 5 user E3 Office 365 subscription that the good folk at Microsoft let me have, as part of my MVP benefits. Note: I’m using Exchange 2016, with a ‘full-hybrid’ migration into Office 365. Step 1:...

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