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License requirement for EOP Quarantine for On-Prem users in Hybrid
If MX is switched to Office 365 in a Hybrid environment and we want to use EOP and Quarantine for On prem mailboxes, what licenses are required? We are in the process of moving all of the mailboxes t...
You can use EOP standalone licenses, no need to assign E3 if they just need hygiene solution.
That makes sense. So I have 2 questions now.
What license feature will enable quarantine feature.
If we enable the exo license before a user is migrated, will it break mail routing or the migration process?
What license feature will enable quarantine feature.
If we enable the exo license before a user is migrated, will it break mail routing or the migration process?
The EOP licence gives you the quarantine. If all you have is the E3 licence the you have the quarantine option, as the E3 includes EOP.
If you are doing a hybrid migration and have synced the ExchangeGUID attribute from on-premises Exchange Server then Exchange Online will not provision a mailbox when you licence the user for Exchange Online. If the migration does not involve a sync from AD, or you filter attributes out of the sync, or doing a cutover migration then don’t provide a EXO licence until you need to as this will create a second mailbox and the world will end! Check in the cloud with Get-Recipient | FT Name,ExchangeGUID and see if each object has a GUID before you move the mailbox. If so, you are safe to licence.
If you are doing a hybrid migration and have synced the ExchangeGUID attribute from on-premises Exchange Server then Exchange Online will not provision a mailbox when you licence the user for Exchange Online. If the migration does not involve a sync from AD, or you filter attributes out of the sync, or doing a cutover migration then don’t provide a EXO licence until you need to as this will create a second mailbox and the world will end! Check in the cloud with Get-Recipient | FT Name,ExchangeGUID and see if each object has a GUID before you move the mailbox. If so, you are safe to licence.
Does the E3 License need to be applied for users to get a quarantine message?
- No - just the EOP licence. As said above, if you apply the E3 licence you get everything else as well but if you are specifically after the EOP functionality then you only need the EOP licence for every on-premises mailbox that a user logs into
