Office 365 Migration Checklist: Migrate Mails to Office365

Last Updated on April 18, 2021 by admin

Everything you need to know as an exchange administrator for Office 365 migration is in this article. Anyone who has performed a migration from a Local Exchange Server to Office 365 knows that the process can be very disconcerting and complex, requiring proper planning and effort to avoid messing up things and blowing up IT resources.

The Most Important Decision - Choosing the right migration method

The most important decision when an Office 365 migration needs to be done is choosing the right migration method. Before you start migrating, completely and thoroughly investigate existing email environment and business needs to evaluate which type of migration is most suitable for your organization.
Never get carried away by the hype that marketers create for Office 365 migrations. There's not just one formula for all type of environments to migrate exchange servers to Office 365.Indeed All exchange server migrations scenarios are not same. In essence, you have to decide between a few possible migration routes from on-premises Exchange to Office 365, depending on how fast you aim to complete the switch, One has to know , how many users need to be moved and how important your IT resources are. Before you jump into the Final Conclusion, you should have a detailed look at all migrations methods. Some migration options you have are mentioned below.

1. Cutover Migration

This option is applicable, where all mailboxes are moved at the same time. You can opt for this type of migration, if you are operating on less than 2000 mailboxes and want to get things done as quickly as possible. Even though cutover migrations are thought to be easy and user friendly design to operate, but still it can't be considered as best solution, when you are migrating all your mails to office365 at one instance. If users have excessively large number of mailboxes, moving them from on-premises to online environment can take an unacceptable amount of time to complete. So, when you have decided for cutover migration, you need to make sure that you have sufficient recourses in hand.

2. Hybrid Exchange Deployment

If you want to move mailboxes in small increments gradually with time, then Hybrid Exchange Deployment is the best option as it allows you to integrate the exchange environment with Office 365. In general, a hybrid deployment facilitates the possibility to provide a mix of on-premises and Office 365 email users for a certain amount of time while getting the look and feel of one unified Exchange environment. If you are going for a hybrid deployment, then you will need to make sure that you manage both on-premises mailboxes as well as those which are based on the cloud, since it is tedious process which can quickly affect your IT resources by putting a strain on them.
On the brighter side, a hybrid exchange deployment will probably prove to be the easiest method for users, as they can access both offline and online resources with only one set of login credentials through a single sign-in, while you can easily manage password policies through Active Directory and remain in full control over security.

3. Third Party Migration

If one wants to migrate mails from some platforms like Novell GroupWise or IBM Lotus Notes to exchange online, then you can explore vast numbers of third-party tools which provide protocols and best practices which can help you to migrate email boxes to Office 365 through easy and convenient ways.

4. IMAP Migration

If you want to migrate mailboxes from a non-Exchange environment to Exchange online, then you should opt for IMAP migration. In some instances, IMAP migrations serve as a shortcut when moving mailboxes from outdated Exchange Server versions (Exchange 2000 and newer are supported). Although it seems affordable in terms of migration, however in practice you will be able to moves only mails, as IMAP migrations are incapable of migrating anything other than e-mails. That leads to loss of crucial information like contacts, calendar entries and all other tasks during the switch to Office 365 Exchange Online.

6. Staged Migration

This type of migration lets you move mailboxes in batches from your local Exchange Server to Office 365 Exchange Online, which makes it your best bet if you have to juggle more than 2000 users and want to scoot them over to cloud-based email as quickly as possible.
Sounds pretty much like a Hybrid Exchange migration to you? Well this could be contradictory you may be right or may be wrong. Let me explain it to you. In both the cases there will be some mailboxes in your on-premises Exchange organization and some in the cloud, the difference lies in the length of co-existence of the two environments. Contrary to a staged migration, where mailboxes are intended to be moved to Exchange Online as quickly as possible, a hybrid deployment is designed for you to simultaneously operate on-premises and online mailboxes for an extended timeframe.

7. Download Office 365

Once you download Office 365 by yourself on your own machine, you'll be able to do migrations on it too. So, please download Office 365 from Microsoft's official website and try this product for free.
Also, from the link below, download Office 365 migration implementation checklist:

Office 365 Implementation Migrations

With the help of above guidelines, users can easily migrate to Office 365. It contains number of bundled tips to help you to make transitions easy and smooth. By following the above guidebook, you can understand the complete migration tool, common roadblocks which users face during migrations and tips and tricks for smooth transition.

Migrations to Office 365 with Stellar EDB to PST Converter

After viewing all options for migrations of Office 365, the most stable option seems to be Stellar EDB to PST Converter and I recommend you to use Stellar EDB to PST Converter for all Office 365 migrations. If Office 365 migrations are done using stellar EDB to PST Converter then the chances of risks are minimized. It facilitates extracting all vital Exchange mailbox data such as emails, contacts, attachments and even archive mailboxes from offline EDB files and then directly exports it to Office 365. For full steps, check this link:

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