Improved handling of mailbox folder permissions, full mailbox access permissions, and send as permissions.
Distribution lists are often utilized to provide permissions in Exchange Online. DLConversionV2 allows administrator to audit these permissions for evaluation during the migration. As a part of the migration process the original group is mail disabled and moved to an organizational unit that does not synchronize to Office 365. The results of this operation is that the group is deleted from Azure Active Directory and Exchange Online.
If full mailbox access, send as, or mailbox folder permissions were assigned to the group that was deleted this results in an orphaned SID remaining on the object. The presence of the orphaned SID may result in the Exchange Control Panel failing to enumerate permissions on the object for administrators leveraging these tools for administration. PowerShell is not impacted by this.
Version 2.9.8.7 has new behavior where the original permission is removed, and the new permission is added. This prevents the introduction of orphaned SIDs which result in management tools failing on migrated distribution lists or objects that had dependencies on migrated distribution lists.
TIMMCMIC 