Hi @Santelo
Shared mailboxes do not need licenses, please check the user permission for the shard mailboxes
Get-Mailbox -RecipientTypeDetails SharedMailbox -ResultSize:Unlimited | Get-MailboxPermission |Select-Object Identity,User,AccessRights | Where-Object {($_.user -ne 'NT AUTHORITY\SELF')} | Export-Csv C:\Temp\sharedfolders.csv -NoTypeInformation
In addtion, if you use any edition of the Microsoft Office 365 productivity suite that includes Exchange Online (such as Office 365 E1, Office 365 E3, and Office 365 E5), you are protected by the Exchange Online Protection (EOP) by Microsoft.
And M/O365 F-SKU licenses may only be assigned to users without a Dedicated Device. A Dedicated Device is a computing device user for work with a 10.1” screen or larger, use by the user more than 60% of the users total work time during any 90 day period.
These are intended for Frontline workers, shared computer users, etc, etc. not for office users as an alternative to the full skus.
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.