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Environment: Exchange Online, DirSync, Exchange 2010 sp3 to manage Distribution Lists.<br />
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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 &quot;Example Group&quot;. 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. <br />
<br />
Hopefully I covered everything...<br />
The only suggestion I saw online was deactivating dirsync, remove groups from office 365, and reactivate dirsync. There has to be a better way.<br />
<br />
Thanks in advance.
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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.

Remove Security Group from DirSync enabled Office 365 Address Book

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.