Do not remove identities blindly
A Microsoft account may still control device sign-in, Office licensing or access to non-email data.
Migrate Microsoft 365 email with shared resources and identity dependencies mapped first.
Prepare Exchange Online mailbox transfer while treating calendars, shared mailboxes, OneDrive, Teams and Microsoft identity as separate scope decisions.
Migrating from Microsoft 365
Understand the source before setting a cutover date.
Microsoft 365 email normally runs through Exchange Online, but the same tenant may also control Entra identities, Teams, SharePoint, OneDrive, Office licences and device policies. Moving mail does not automatically replace those services or remove the need for a deliberate identity plan.
Envelaro begins with authorized source access and an inventory of user mailboxes, shared mailboxes, aliases, distribution lists, mailbox sizes and delegated permissions. Calendar and contact portability is assessed separately from messages and folders.
The source tenant remains active while the Envelaro destination is provisioned and eligible data is prepared. Mail-routing and sender-authentication changes are staged for an approved window, followed by delivery checks, final synchronization and a documented decision about remaining Microsoft services.
Migration discovery
Bring these facts to the first assessment.
A complete inventory lets Envelaro confirm the viable access method, responsibilities and validation plan before either provider is changed.
- 01Authorized Microsoft 365 administrator
- 02User and shared mailboxes with delegated access
- 03Aliases, distribution lists and mail-flow rules
- 04Calendar, contact and archive requirements
- 05Teams, OneDrive, SharePoint and Entra identity dependencies
Source-specific boundaries
Three details that prevent an incomplete migration.
Map shared mailboxes
Delegation and send-as behavior need explicit destination decisions rather than a simple message copy.
Check third-party sending
Applications using Microsoft connectors or SMTP settings require a separate update and test.
Controlled sequence
Read all six migration checkpoints Prepare, copy, validate, cut over and close out.
The old provider continues operating while Envelaro prepares the destination and runs the agreed initial data copy. The administrator approves DNS changes only after destination mailboxes and user access are ready. Inbound and outbound delivery are then tested before the source service is retired.
Completion criteria: A completed Microsoft 365 email migration confirms approved Exchange mailbox data, destination access, inbound routing and authenticated outbound delivery. Shared mailboxes, distribution lists, send-as permissions and application connectors should each have a recorded destination decision. The organization must also retain or replace any Entra sign-in, Office licensing, Teams, OneDrive and SharePoint dependency before removing users or subscriptions from the Microsoft tenant. Document the final tenant owner, retention period and rollback contact before the source environment is changed.
Make business email one less thing to operate.
Tell us about your domains, mailbox requirements and current provider. We will help you plan onboarding and migration.