Or another alternative is, convert them to normal distribution groups and then synchronize them that way. Your other options are to manually re-create them in the cloud. Therefore, if you want to keep your Dynamic Groups, then you have to keep them on-premises. The problem is, Azure AD is not the same as your on-premises AD, and there may be elements of the Directory that do not correspond 1-1, so some queries wouldn’t really be able to execute in the same way. If you meet the criteria at the time an email is sent to that “group,” then you will get a copy of the message. recipients are located in the “Human Resources” OU). So for example there are some criteria that need to be met (e.g. In other words, members of the group are determined via a query that is run at the time the email is sent to the group. What they are essentially, is a stored query. They don’t sync because they aren’t really the same type of object as a normal distro group. In a hybrid scenario, where you have Azure AD Connect synchronizing your Active Directory objects for single-sign on with Office 365, Dynamic Distro Groups simply will not sync. (Yes, I just made that word up, but now it is a real word–that’s how words are made). Dynamic Distribution Groups are not directly “migratable” to Office 365.

How to sync office 365 groups with ad