Environment: Exchange Online, DirSync, Exchange 2010 sp3 to manage Distribution Lists.
We have a security group that is showing up in the Distribution Lists in Exchange Online. I removed the exchange attributes using the following command: Disable-DistributionGroup -Identity "Example Group". The group is no longer showing up on our on prem distribution list, but it is still visible in Exchange Online as a security group. I can see in DirSync that it did remove exchange attributes, and the only email address showing up in exchange online is an autogenerated onmicrosoft.com address. I even changed it to a global security group instead of a universal security group, but it still won't go away.
Hopefully I covered everything...
The only suggestion I saw online was deactivating dirsync, remove groups from office 365, and reactivate dirsync. There has to be a better way.
Thanks in advance.