Two of the most common migration strategies are cutover and staged migrations. Cutover strategies involve migrating all mailboxes over a weekend, ready for your users on Monday morning. Staged strategies provide more flexible migration options, as explained below:
1. The cutover migration strategy
You migrate everybody over a weekend. This strategy is the simplest to implement. You can migrate your mailboxes in a single pass migration or envisage a prestaging strategy where you run multiple migration passes. Cutover migration is, therefore, a strategy where the entire company is switched at the same time.
1.1 The Cutover migration benefits
- Fastest, simplest form of migration
- Your users can start using the new mail system immediately
- New emails are received in the target messaging system
- Old emails are migrated in a single pass
1.2 The Cutover migration considerations
You can combine your cutover migration with prestaging, if required. In this case, during the days or weeks leading up to your cutover, you would migrate all emails up to a week or so ago along with calendars and contacts, then on the day of your cutover, you would run a quick delta pass to migrate the remaining items.
2. Staged migration strategy
A staged migration allows you to migrate batches of mailboxes over the course of a few weeks or months. This strategy is useful for migrations with large volumes of data (Large mailboxes or numerous mailboxes) and you estimate that you won’t be able to do your migration over a single weekend. Cloudiway offers you additional flexibility in your approach to a staged migration.
For example, you could migrate the last six months of emails over a weekend and leave older emails and email archives to be migrated after cutover, explaining to users that their older emails will appear soon. Prestaging is also an option on the Cloudiway platform. For example, you could perform a multi-pass migration where you migrate most mailbox items before performing the final cutover. During the days or weeks leading up to your cutover, you would migrate all emails up to a week or so ago along with calendars and contacts, then on the day of your cutover, you would run a quick delta pass to migrate the remaining items.
Cloudiway provides a number of options to help you find the best strategy for a staged mail migration. We provide coexistence services, plus mail routing, and batch migration of users, which you can define in any way you like. Basically, you can choose who, when and what gets migrated during each pass.
2.1 Staged migration benefits
- Many flexible migration strategies when using the Cloudiway platform
- Allows more time before final cutover, avoiding tight deadlines
- Complex migrations can be completed without disrupting end users
- Can be performed in batches according to your needs
2.2 Staged migration considerations
Staged migrations tend to be more complicated than single cutover migrations. Therefore, it’s important to plan your approach thoroughly before starting your migration.