This document discusses migrating to Office 365. It covers co-existence options like shared or multiple address spaces when also keeping an on-premise Exchange server. Types of migrations include IMAP cutover, Exchange cutover, staged coexistence, and hybrid coexistence. Setting up single sign-on requires Active Directory Federation Services and DirSync. A real-world migration example outlines planning, choosing a migration type, and using the Exchange Control Panel to complete a 400 user migration over 5 days.

1. Migrating to Office 365
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2. Who Am I
• IT Consultant
• Worked in education for over 18 years
• Led teams in the early adoption of Microsoft
systems
• Regular presenter at events
• SharePoint MVP
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3. Topics
• Office 365 co-existence options
• Types of migration
• Single Signon
• A client migration – Real World
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4. Co-Existence
• You already have onPremise Exchange
• Shared Address Space
– Use the same domain name for all users
– OnPremise or cloud receives email
– Forwards onto the other one
• Multiple Addresses
– Use different domain names for onPremise & Cloud
– Each entity receives its own email
– Manage mail contacts in either onPremise or cloud
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5. Types Of Migration
• IMAP cutover: E-mail is extracted from the source mail system by IMAP,
DNS MX records are changed, and workstations configured to connect to
Office 365. E-mail is moved, but no contacts and calendars.
• Exchange cutover: Same as IMAP but it uses RPC over HTTPS (Outlook
Anywhere) to extract your entire mailbox from a legacy Exchange e-mail
system (2003 or later only).
• Staged coexistence: Similar to an Exchange cutover, but allows for batches
of users to move at a time and for the two systems (Exchange and Office
365) to interoperate over a period of time.
• Hybrid coexistence: This solution is intended for customers who require
onsite and cloud e-mail systems to coexist for longer periods. Active
Directory and Office 365 synchronize and single-sign-on is set up. This is
the most technically complex migration method but makes for the easiest
mailbox migrations, simply using the existing Exchange Management
Console’s commands.
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6. Single Signon
• Use Active directory account to access Office
365
• Uses Active Directory federation services
– Minimum 4 servers for load balancing
– Federation server & Federation proxy server
– PowerShell to form ‘link’
• Separate server for DirSync software
• DO NOT ENABLE BEFORE MIGRATION
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7. Real World Migration
• Planning
– Prepare your AD
• Delete users
– Clean up Exchange
• Empty deleted items
• Empty sent items
• Migration type
– Choose the right one for your environment
• How many users
• Keeping onPremise
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8. Real World Migration
• Migration takes time
– 400 users took 5 days
– Incremental updates after full migration
• Complete migration
– Convert mailboxes to mail enabled users
– PowerShell scripts downloadable from Microsoft
• All migrations run from Exchange Control
Panel
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9. Demo – Sort Of !!
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10. Federated Login
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11. Federated Login
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12. Exchange Control Panel
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13. Email Migration
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14. onPremise Server Details
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15. onPremise Server Details
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16. • arichards_Saruk
• alan@sharepointedutech.com
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