Due to increasing cyberattacks on on-premises Exchange servers, many organizations have either migrated to cloud-based Office 365 or are in the process of doing so.
This shift has been witnessed recently due to ransomware attacks on-premises Exchange server by a threat group named HAFNIUM.
Although Microsoft releases security updates to counter such attacks, on premises Exchange servers are still vulnerable to various malicious attacks, physical damage, hardware or software failure, etc.On the other hand, Office 365 or Exchange Online offers better security features.
In this guide, we help you migrate mailboxes from Exchange on-premises version to Office 365 with step-by-step process.How to Migrate Exchange from On-Premises to Office 365?To migrate Exchange on-premises to Office 365, you have five different methods:Cutover MigrationStaged MigrationHybrid DeploymentPST UploadEDB to Office 365 Migration SoftwareThe first three methods are specific and do not work with all Exchange versions.
It uses parallel processing technique and thus, migrates up to 4 mailboxes simultaneously.
This can help you minimize the downtime and quickly restore mailbox connectivity.Steps to migrate Exchange on-premises to Office 365 via PST method are as follows:Step 1: Assign Mailbox Import Export RoleTo export mailboxes from Exchange on-premises server database to PST, Mailbox Import Export role should be assigned to the user account, which will be used to export the mailboxes via Exchange Admin Center (EAC) or Exchange Management Shell (EMS).