Defender Licensing shared mailboxes

[topogigio]

Hi,

to add Defender to a shared mailbox it is required the Defender license only, or the Defender + an exchange P1 license?

In the past I'm quite sure the P1 was required, today seems not, but I cannot find explicit doc.

thanks

[#2]

Exchange license is only needed if the shared mailbox is above 50GB or has archive/hold enabled. But it goes without saying that no one here is authorized to quote licensing terms on behalf of Microsoft, so best check with your local MS reps.

[#3 · Accepted solution]

Hi there! - you may find the following useful:

https://docs.microsoft.com/en-us/office365/servicedescriptions/office-365-advanced-threat-protection...

If you're not using the shared mailbox in any way which requires an Exchange Online Plan 1 license, but it is benefitting from MDO protection, you only need the MDO license.