Mapping groups
Mapping groups enable you to logically group mapped drives with specific configurations, access permissions, and other settings, such as policies that govern their behavior. CDM provides you with a default mapping group and allows you to create 199 custom mapping groups.
As its name suggests, a default mapping group is created for you automatically. When you map your first drive via Iris, it is assigned to your default mapping group. While mapping drives to your default mapping group, keep the following rules in mind:
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You can’t delete a default mapping group. However, you can delete existing drives from your default mapping group and add new drives.
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You can only map one drive letter to a OneDrive for Business drive.
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You can map multiple drive letters to Direct: SharePoint document library, Direct: SharePoint site, and Direct: Shared OneDrive drives.
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You can only have one of each dynamic drive type within your default mapping group.
If you want to add a new drive to your default mapping group, select Configure mapping groups from the Dashboard, then Add Drive on the Default mapping group tab. To delete an existing drive from your default mapping group, select 
for the drive you want to delete on the Default mapping group tab.
Custom mapping groups come in handy if you want to set up different mapping configurations for different users within your organization. When you create a new custom mapping group, you can either inherit the configuration of your default mapping group or add mappings to your new mapping group from scratch.
