Prerequisite

May 31, 2018 | by iaur | posted as Hybrid(EXO), M365 Migration

• Exchange server with working mail flow(internal and external)

• Exchange server accepted domain(vanity) should be set to Internal relay

• Running DirSyc with Office 365

• On the Prem, you need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the “Mailbox Move and Migration Permissions” section in the Recipients Permissions topic.

• Hybrid deployment is configured between your on-premises and Exchange Online organizations.

• If you’re running Exchange 2013, make sure the Mailbox Replication Proxy Service (MRSProxy) is enabled on your on-premises Exchange 2013 Client Access servers.

From <https://technet.microsoft.com/en-us/library/o365e_hrcmoverequest_fl312271(v=exchg.150).aspx>

Limits

Size and throughput

https://technet.microsoft.com/en-us/library/exchange-online-limits.aspx

Misc

Express Hybrid

https://support.office.com/en-us/article/use-minimal-hybrid-to-quickly-migrate-exchange-mailboxes-to-office-365-fdecceed-0702-4af3-85be-f2a0013937ef

https://support.office.com/en-us/article/ways-to-migrate-multiple-email-accounts-to-office-365-0a4913fe-60fb-498f-9155-a86516418842

Full hybrid

https://technet.microsoft.com/en-us/library/o365e_hrcmoverequest_fl312271(v=exchg.150).aspx