SiteGround to Office 365 Email Migration
Move SiteGround-hosted email to Microsoft 365 while keeping the website/domain hosted at SiteGround if required. This EdbMails workflow uses SiteGround IMAP as the source and migrates supported email data to Exchange Online.
Standard IMAP migration covers supported messages, attachments, mail folders, folder hierarchy, and common message properties. Contacts, calendars, tasks, websites, databases, and SiteGround hosting configuration are outside this email migration workflow.
SiteGround documents secure IMAP on port 993 with SSL/TLS. The exact incoming server name for each mailbox is available under Site Tools > Email > Accounts > Mail Configuration > Manual Settings.
The EdbMails IMAP Migration Tool supports bulk CSV loading, source-to-target mapping, selective migration, concurrent processing, incremental follow-up runs, and reports.
Use this provider-specific page together with the main IMAP to Office 365 migration guide for destination-wide Microsoft 365 planning and cutover.
Why Organizations Move SiteGround Email to Microsoft 365
- Keep SiteGround for website/domain hosting while Microsoft 365 becomes the production mail platform.
- Centralize Exchange Online user, license, mailbox, security, and mail-flow administration.
- Use Exchange Online alongside Teams, SharePoint, and OneDrive. Standard IMAP migration itself transfers email rather than collaboration workloads.
- Use staged migration with incremental follow-up passes before the final MX/DNS cutover.
User Query
“I recently received approval for a Microsoft 365 Business standard subscription and am currently hosting my website and registering domain names with SiteGround. I'd like to migrate all of my SiteGround email accounts to Office 365 without changing the domain name of my website. This means that we want to continue receiving emails on the SiteGround email domain, but we also want them to arrive in our Office 365 mailbox without any conflicts. It's said to have something to do with MX records. Could someone please walk me through the entire procedure? Thank you very much.”
SiteGround to Office 365 migration plan
- Inventory SiteGround email accounts, mailbox sizes, folders, aliases, and active users.
- Open Site Tools > Email > Accounts > Mail Configuration > Manual Settings and record the exact incoming server name.
- Use secure IMAP port 993 with SSL/TLS.
- Create/provision Microsoft 365 target mailboxes and assign licenses.
- Add and verify the custom domain in Microsoft 365 while leaving the website hosting unchanged if desired.
- Review source connection limits, Microsoft 365 throttling, message-size limits, and bandwidth.
- Run a pilot and verify the target before production migration and DNS cutover.
Pre-migration Steps for SiteGround to Office 365
SiteGround source
- Find the exact incoming server name in Site Tools > Email > Accounts > Mail Configuration > Manual Settings.
- Use IMAP port 993 with SSL/TLS and the full email address/password required by the SiteGround account.
- For bulk migration, prepare the EdbMails CSV and test a small representative set first.
Microsoft 365 target
- Create/provision target mailboxes and assign the required licenses.
- Add and verify the custom domain if Microsoft 365 will receive production mail.
- Use the current EdbMails OAuth-based Microsoft 365 connection.
- Review target throttling and message-size limits and run a pilot before production migration.
- To connect a single SiteGround mailbox, select ‘Single User / Account Migration’, choose ‘Connect to IMAP Server’, and click ‘Next’.
SiteGround to Office 365 Post-migration Tasks
- Verify the Microsoft 365 target
Review reports and check representative folders, messages, attachments, item counts, and user access.
- Update mail DNS when ready
If Microsoft 365 becomes the production mail service, change the required MX/DNS records after target validation. SiteGround can continue hosting the website.
- Validate Outlook/client access
Confirm Microsoft 365 sign-in and Autodiscover behavior and recreate profiles only where required.
- Retain the SiteGround source during validation
Keep the old mailboxes for the agreed transition period before removing or decommissioning them.
- Verify the Microsoft 365 target
Troubleshooting Guide for SiteGround to Office 365 Migration
For troubleshooting, check out our knowledge base articles. If you have additional questions, browse the FAQs or contact our dedicated support team for personalized assistance.
Benefits of EdbMails for SiteGround to Office 365 Email Migration
- Selective migration
Choose required mailboxes/folders and apply supported IMAP filters and exclusions.
- Flexible target mapping
Review source-to-target mailbox/folder mapping and correct destinations manually where needed.
- Incremental follow-up runs
Process eligible new or changed email items after the first pass for staged migration.
- Concurrent mailbox processing
Process multiple mailboxes in parallel, subject to source limits, Microsoft 365 throttling, bandwidth, and migration-computer capacity.
- Preserve supported email structure
Retain supported mail folders, messages, attachments, and common message properties exposed through SiteGround IMAP.
- Reports and verification
Use migration reports plus target-side checks before changing production mail flow.
