August 10, 2022
For those who plan emigrate or transfer mailboxes from on-premises Change Server to Administrative center 365 or Microsoft

For those who plan emigrate or transfer mailboxes from on-premises Change Server to Administrative center 365 or Microsoft 365, chances are you’ll make a choice any of the 4 given the right way to migrate mailboxes from on-premises Change Server to Administrative center 365 or Microsoft 365.

  • Cutover Migration for Change 2003 and later variations.
  • Staged Migration for Change Server 2003 and 2007.
  • Hybrid Migration for Change 2010 and later variations.
  • IMAP Migration for Gmail, Change, Outlook.com, and different IMAP-enabled electronic mail servers.

On this article, we can speak about the IMAP migration means intimately and discover ways to use this system for transferring mailboxes from Change or different IMAP servers to Administrative center 365 or Microsoft 365.

migrate mailboxes

What’s IMAP Mailbox Migration?

IMAP migration is a technique to transport mailboxes or content material of person mailboxes from non-Change servers or IMAP-enabled servers to Administrative center 365 or Microsoft 365. Alternatively, you may additionally use the strategy to transfer mailboxes from Change Servers with IMAP4 configuration.

How does IMAP Migration Paintings?

In IMAP migration, directors are required to create person mailboxes on Administrative center 365 or Microsoft 365 and assign licenses to turn on the mailboxes. Then they want to create a CSV record containing the main points of all electronic mail accounts or mailboxes that want to be migrated. The tips contained within the CSV record varies in accordance with the IMAP electronic mail server. Alternatively, it normally comprises the mailbox or account person title, electronic mail ID, and password separated by means of commas.

The administrator will have to additionally create an endpoint to permit communique between the IMAP server and Administrative center 365 to finish the migration. After growing the endpoint, the administrator will have to add the CSV record on Administrative center 365 tenant. Administrative center 365 makes use of the ideas equipped within the CSV record to ascertain connectivity and robotically sync the mailboxes from the supply electronic mail server to the vacation spot.

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As soon as the migration is completed, the administrator will have to delete the IMAP migration batch to forestall the synchronization and redirect the e-mail messages to the brand new Administrative center 365 server by means of updating MX information.

migrate mailboxes

Issues to Believe Prior to The use of IMAP for Mailbox Migration

Whilst IMAP migration would possibly seem handy, it has some boundaries that you just will have to believe whilst opting for the process for transferring your mailboxes to Administrative center 365.

  • The IMAP migration handiest strikes the emails at the side of attachments to Administrative center 365. Different mail pieces, comparable to Contacts, Calendar pieces, Notes, Duties, and so on., don’t seem to be migrated to Administrative center 365 or Microsoft 365.
  • You’ll transfer person mailboxes containing not more than 500,000 pieces. Additionally, the emails are migrated in descending order, i.e., latest to oldest.
  • Emails better than 35 MB don’t seem to be moved all through IMAP migration.

Have an effect on on E mail Services and products and Customers

There’s no affect at the customers’ get right of entry to to their electronic mail accounts or electronic mail products and services by means of default. Alternatively, if you happen to reset the e-mail accounts passwords to create the CSV record for transferring the mailboxes and the customers don’t have the brand new password, they are going to fail to get right of entry to their electronic mail accounts all through or after the mailbox migration. You will have to percentage the brand new password with the respective person.

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migrate mailboxes

How you can Use IMAP Migration for Shifting Mailboxes?

To transport mailboxes from on-premises or any IMAP-based electronic mail server, you will have to create person accounts and assign licenses to turn on the mailboxes. You’ll use the Administrative center 365 or Microsoft 365 Admin Middle or PowerShell cmdlets to assign the licenses. You could assign Administrative center 365 licenses in my view or in bulk in accordance with your necessities.

Subsequent, you want to create a CSV record containing the e-mail deal with, username, and password. You could use Notepad or Microsoft Excel/Google Sheets to create a CSV record.

As an example,

EmailAddress,UserName,Password

[email protected],[email protected],xyhhGFfhxp.cvg$fd

[email protected],[email protected],zhyu&hsbhjsp.c4hh

migrate mailboxes

Ensure that there aren’t any additional areas.

Save the record as .csv and open Administrative center 365 Change Admin Middle.

Click on Migration after which click on Upload migration batch.

migrate mailboxes

Kind the migration batch title. You’ll title it the rest and make a choice Migration to Change On-line. Click on Subsequent.

Make a choice IMAP Migration from the Make a choice the migration sort: dropdown and click on Subsequent > Subsequent.

migrate mailboxes

Make a choice Create a brand new migration endpoint and click on Subsequent.

Input the Migration endpoint title, Most concurrent migrations, and Most concurrent incremental syncs. Click on Subsequent.

migrate mailboxes

Input the IMAP server deal with, make a choice encryption, and input the port quantity. Click on Subsequent.

The endpoint can be stored. Click on Subsequent.

Click on Obtain a CSV record with headers and pattern person knowledge. This may obtain the pattern CSV record the place you’ll input the person knowledge.

After getting into the main points, save the record and click on Browse to choose the CSV record. Click on Subsequent.

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migrate mailboxes

You could upload filters to incorporate or exclude mail folders or pieces all through the migration. Click on Subsequent.

Make a choice the person who can be notified as soon as the migration is whole and make a selection the required way to get started the migration robotically or manually. You might also agenda it.

migrate mailboxes

Click on Save. You’re going to get the standing after some time. Click on Completed.

migrate mailboxes

You could additional test the sync standing within the migration batches.

migrate mailboxes

As soon as the migration is done, make a selection the migration batch and click on Delete to take away the batch.

migrate mailboxes

At this degree, you have got effectively moved your mailboxes from Change or any IMAP-enabled electronic mail server to Administrative center 365 or Microsoft 365.

To Wrap Up

When transferring mailboxes from the Change Server, Staged or Cutover Migration is advisable. IMAP migration isn’t advisable for transferring mailboxes from Change Server until you’re experiencing problems with the Cutover or Staged Migration.

You’ll additionally use an EDB converter device, comparable to Stellar Converter for EDB, to conquer the constraints and guide efforts required in IMAP, Staged, and Cutover migration strategies. But even so, the device works with all Change variations, together with Change 2019, 2016, 2013, 2010, 2007, 2003, 2000, and 5.5.

You’ll use the device to export the mailboxes out of your on-premises Change database record (offline) without delay to Administrative center 365 tenant. As well as, the device can export the mailboxes at as much as 4x velocity and robotically maps the supply and vacation spot mailboxes. This makes it more straightforward and sooner to transport mailboxes between on-premises Change and Administrative center 365.