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Exchange to 365 Migration

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This article will help guide you through migrating from the Hosting UK Exchange services to Office365

A quick checklist of things you'll need before beginning:

  1. A windows computer where you can run Powershell
  2. Access to the Control Panel at
  3. Access to your Office365 Service


Creating a User for the Migration

A user will either need to be created or promoted to a "Manager" in order to allow the migrator access to move all the accounts. Use the steps below to promote a user to manager.

1. Login to your account at

2. Go to ServicesMy Services

3. Click on your Exchange Service


4. Go to Mailboxes

5. Next to the account you with to give manager control, click "Promote to manager"


We need to give the user Full access, for this, we need to use powershell


Go to the Start Menu on your computer and search for Powershell, you should get an app for Windows Powershell show up

This should launch a window that looks like this:

Run the command:

$UserCredential = Get-Credential

This will give a login window. Enter in the email address and password for the account you set to manager

Run the command:

$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri -Authentication basic -Credential $UserCredential

and then:

Import-PSSession $Session -DisableNameChecking

which will log you into the server
Run the command:


Which will give you a list of all your users.

Give the user Full access:

Get-Mailbox | Add-MailboxPermission -User MAILBOX -AccessRights Fullaccess -InheritanceType all

(where the command says "MAILBOX" replace with your user i.e "sales")

Once this is done, you would perform a cutover migration as detailed at , starting from Step 2: Connect Microsoft 365 or Office 365 to your email system and using the Account with privileges:, namely the administrator user you created above.

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