Quick answer
- Admin way: create Microsoft 365 mailboxes first, then use Microsoft's IMAP migration with a CSV file of SiteGround mailbox logins.
- Outlook way: add SiteGround and Microsoft 365 accounts to Outlook and drag folders across. It suits one small mailbox.
- Software way: desktop software signs in to SiteGround over IMAP, lets you select folders and filters, then exports SiteGround emails to Office 365.
SiteGround email lives on a hosting server, and Office 365 cannot pull it across with a single button. Dragging mail by hand fails on big mailboxes, and Microsoft's own migration needs CSV files and admin steps that confuse first-time users. Below are three ways to migrate SiteGround email to Office 365, with real steps, limits and fixes for missing SiteGround emails in Office 365.
What do you need before you migrate SiteGround email to Office 365?
You need three things: your SiteGround mailbox login, your SiteGround IMAP server details and a licensed Office 365 mailbox that already exists. SiteGround lists IMAP on port 993 and SMTP on port 465. Your username is your full email address, and exact server names sit in Manual Settings for every account. Read SiteGround's mail client configuration guide for your values.
Create Office 365 users and assign licenses first, because Microsoft's IMAP migration needs mailboxes in place before it starts. Skip POP3 settings, since POP3 removes mail from SiteGround after download.
How to migrate SiteGround emails to Office 365 with Microsoft IMAP migration?
Microsoft IMAP migration copies mail from SiteGround to Office 365 mailboxes in batches. It carries email only, so contacts, calendar items and tasks stay behind. Limits apply: 500,000 items per mailbox, copied from newest to oldest, and 35 MB per email. Microsoft's IMAP migration guide lists every step.
- Create users in Microsoft 365 and assign licenses.
- Verify your domain if you use a custom domain, then gather SiteGround IMAP details for every mailbox.
- Save a CSV file with email address, username and password for every mailbox.
- Connect Microsoft 365 to SiteGround with a migration endpoint that holds your IMAP server and port 993.
- Create a migration batch, upload your CSV file and start it.
- Check migrated mail in every mailbox.
- Change your MX record so new mail lands in Microsoft 365, then delete your batch to stop syncing.
That path suits admins who move SiteGround email to Office 365 for many mailboxes under a custom domain. It fails for one-off moves, since it needs admin rights, CSV files and MX changes, and it skips calendars and contacts.
How to move SiteGround emails to Office 365 in Outlook?
Add both mailboxes to Outlook and drag folders from SiteGround into Office 365. That works for one small mailbox. Large folders time out and message properties can drop in transit.
- Open Outlook and add your SiteGround account as IMAP with your full email address, IMAP server and port 993.
- Add your Office 365 account in Outlook.
- Open your SiteGround Inbox and select all messages with Ctrl+A.
- Drag messages into a folder under your Office 365 account.
- Repeat for Sent, Drafts and custom folders, then compare folder counts.
Check Outlook sync status before you close it, since an incomplete sync leaves mail unmoved. For moves from other hosts, see how to migrate iPage email to Office 365 and how to migrate Yandex to Office 365.
How to export SiteGround emails to Office 365 in bulk with software?
Use Corbett IMAP Migration Tool to export SiteGround emails to Office 365 without CSV files or MX changes. Its page says it moves emails, attachments, folders and headers from any IMAP account to Office 365, supports OAuth 2.0 or admin impersonation for Office 365 and skips duplicate emails. Free demo moves 10 items per folder.
Steps to export SiteGround emails to Office 365 with software
- Install Corbett IMAP Migration Tool on your Windows PC and start setup with Run as Administrator.
- Go to Email Accounts and select Add Account.
- Enter your SiteGround email address and password, then select Find so software detects host and port. If login fails, open advanced settings and enter your SiteGround IMAP server.
- Preview your mailbox tree. Untick Spam, Trash or any folder you do not need.
- Set date, sender or attachment filters if you want fewer emails.
- Select Export, choose Office 365 and sign in to your Microsoft account.
- Start migration and watch live progress for every folder. A log and CSV report list what moved and what failed.
Test your SiteGround to Office 365 move on one mailbox in free demo, compare folders in Outlook and then buy. Lifetime licence starts at $99 with a 30-day money-back window. Folder names carry over when you transfer SiteGround emails to Office 365, so your new mailbox mirrors SiteGround. To move SiteGround mail to a free mailbox instead, read how to migrate SiteGround to Gmail. For other IMAP hosts, read how to migrate IMAP to Office 365.
Which way to export SiteGround emails to Office 365 is best?
Use Microsoft IMAP migration for many mailboxes under admin control and Outlook for one small mailbox. Use software to export SiteGround emails to Office 365 when you need filters, folder selection, a progress log or no MX change.
| Way to move SiteGround to Office 365 | Cost | Needs | Filters | Best for |
|---|---|---|---|---|
| Microsoft IMAP migration | Free | Admin rights, CSV file, endpoint, MX change | None | Many mailboxes |
| Outlook drag and drop | Free | Outlook, both accounts | None | One small mailbox |
| Corbett IMAP Migration Tool | Free demo, then from $99 | Windows PC, mailbox logins | Date, sender, receiver, attachment size | Selective or large moves |
Why are SiteGround emails missing in Office 365?
Missing mail comes from four causes after you migrate SiteGround email to Office 365. Microsoft IMAP migration skips contacts, calendar items and tasks, and it stops at 500,000 items per mailbox. Emails above 35 MB do not copy. Outlook drag and drop times out on big folders. Unticked folders and active filters leave mail behind in any tool.
Compare folder counts first when SiteGround emails to Office 365 look incomplete, then open your log or batch report to find failed items. To keep a copy of SiteGround mail before you move it, read how to download IMAP emails from a server. To pull files or addresses from SiteGround mail, see how to extract SiteGround email attachments and how to extract email addresses from SiteGround.
Key takeaways
- To migrate SiteGround email to Office 365, note that SiteGround uses IMAP port 993 and your full email address as username. Find server names in Manual Settings.
- Microsoft IMAP migration needs existing licensed mailboxes, a CSV file and a migration endpoint. It moves email only.
- Microsoft limits migration to 500,000 items per mailbox and 35 MB per email.
- Outlook drag and drop suits one small mailbox and times out on large folders.
- Corbett IMAP Migration Tool exports SiteGround emails to Office 365 with folder selection, filters and a log. Free demo moves 10 items per folder.
Questions about SiteGround emails to Office 365
How do I export SiteGround emails to Office 365?
Use Microsoft IMAP migration with a CSV file, drag folders in Outlook or load your SiteGround mailbox in migration software and export to Office 365.
What are SiteGround IMAP settings?
IMAP uses port 993 and SMTP uses port 465. Your username is your full email address. Exact server names sit in Manual Settings for your account.
Can I move SiteGround email to Office 365 for free?
Yes. Microsoft IMAP migration and Outlook drag and drop cost nothing. Software adds filters, folder selection and a progress log.
Do I need Office 365 mailboxes before migration?
Yes. Microsoft requires users to exist and hold licenses before IMAP migration starts.
Does IMAP migration move contacts and calendars?
No. Microsoft IMAP migration carries email only and skips contacts, calendar items and tasks.
What item limit does IMAP migration have?
Microsoft lists 500,000 items per mailbox, copied from newest to oldest, and a 35 MB limit per email.
Do I need to change my MX record?
Microsoft IMAP migration needs an MX change to route new mail to Microsoft 365. Software that copies mail between mailboxes does not move your domain mail flow, so change MX only when you switch hosts.
Does software keep SiteGround folder names?
Yes. Corbett's page says original folder names carry to your target, so Office 365 mirrors SiteGround.
How many emails does free demo move?
Free demo moves 10 items per folder. Full edition lifts that cap.
How does software sign in to Office 365?
Corbett's page lists OAuth 2.0 or admin impersonation for Office 365 mailboxes.