Tune Exchange Online (O365) Performance

To improve the speed of migration and reduce your organization’s bandwidth constraints for Exchange Online, consider the following:

  • Reduce mailbox sizes and always use cached mode
    • Smaller mailbox size improves migration speed. Cached Exchange Mode enables a better experience when you use an Exchange account. In this mode, a copy of your mailbox is saved on your computer. This copy provides quick access to your data, and it is frequently updated with the server that runs Microsoft Exchange.
  • Use the mailbox move capabilities with an Exchange hybrid deployment:
    • With an Exchange hybrid deployment, offline mail (in the form of .OST files) does not require re-download when migrating to Exchange Online. This significantly reduces your download bandwidth requirements. A hybrid deployment provides the seamless look and feel of a single Exchange organization between an on-premises Exchange organization and Exchange Online in Microsoft Office 365. In addition, a hybrid deployment can serve as an intermediate step to moving completely to an Exchange Online organization.
  • Schedule mailbox moves to occur during periods of low Internet traffic and low on-premises Exchange use:
    • When scheduling moves, migration requests are submitted to the mailbox replication proxy and may not take place immediately.

For support migrating to Office 365 or enhancing your current environment. Contact Us at www.SkyBridgePro.com 

 

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Get-MailboxPermission to recreate permission in the Exchange Online

I am currently migrating a customer from Exchange On-premise 2010 to Office365 using BitTitan MigrationWiz and a cutover approach. One of the challenges that we see is that with this approach we have to re-create all the accounts in Office365 first before we can start using them. At this particular organization, as many other, the are several delegation and permission being utilized that we will need to re-create in Office365 Exchange online. To simplify the process I exported all the permission to a CSV and processed the data in Excel to convert the lists of users and permissions from a DisplayName to an SMTP or UPN format. With that I was able to recreate the permission in Office365 – Exchange Online.

Get-Mailbox | Get-MailboxPermission | where {$_.user.tostring() -ne "NT AUTHORITYSELF" -and $_.IsInherited -eq $false} | Select Identity,User,@{Name='Access Rights';Expression={[string]::join(', ', $_.AccessRights)}} | Export-Csv -NoTypeInformation "C:\FolderPath\MailboxFolderPermission.csv"

Top 10 reason why you should use a Hybrid Migration over a Staged migration (Exchange Online)

I published this lists few years ago. But I think is still very relevant, that is why I decided to review it and put it on the top again. This is by far my preferred migration method.

  1. Secure mail routing between on-premises and Exchange Online organizations. Require TLS authentication
  2. A unified global address list (GAL), also called a “shared address book.”
  3. Free/busy and calendar sharing will continue working between on-premises and Exchange Online.
  4. Centralized control of inbound and outbound mail flow. Costumer can configure all inbound and outbound Exchange Online messages to be routed through the on-premises Exchange organization.
  5. A single Microsoft Office Outlook Web App URL for both the on-premises and Exchange Online organizations. User will continue visiting OWA and they will get redirected from there to the cloud if needed.
  6. The ability to move existing on-premises mailboxes to the Exchange Online organization without interrupting the end-user.
  7. Exchange Online mailboxes can also be moved back to the on-premises organization if needed.
  8. Centralized mailbox management (Cloud and on-premises mailboxes) using the on-premises Exchange admin center (EAC).
  9. Message tracking, MailTips, and multi-mailbox search between on-premises and Exchange Online organizations will continue working
  10. No need to reconfigure the end-users’ profile. User will keep rules, signature and .n2k files in their outlook.