Forum Discussion
On premise group to Office 365 group
We are starting to migrate our groups to the cloud and we found that there is a great big list of groups we've used in the past they are not elligible to be migrated, ie. mail enabled security group,...
You can definitely mail-disable a security group: https://technet.microsoft.com/en-us/library/bb123805(v=exchg.141).aspx
Depending on how many and complex of these you have, you could look at exporting the memberships to CSV, deleting and starting again.
Although if you're using Azure Active Directory Connect then you should be able to sync most of the groups from on-prem AD into Azure AD.