Azure Active Directory and multiple Office 365 tenancies

Hello,

Is it possible to sync a single AD Forest to Azure Active Directory and then utilize multiple and separate Office 365 tenancies from this single AAD account?

• For instance we have three customers in our on-prem forest.
• We sync these to AAD.
• We then grant them their own Office 365 tenancies

Would the issue be needing the same addressable UPN suffix to get into AAD but then separate UPN suffixes in order to have separate Office 365 tenancies/accounts....?

Thanks
M12