Build your own drives with Dynamic: Custom

Published 9 November 2026 · by The IAM Cloud team

Dynamic: Custom lets you build your own drives in Cloud Drive Mapper, bringing SharePoint sites, document libraries, Teams, and OneDrives together behind one drive letter. It's available now for every customer, with no extra licence.

Cloud Drive Mapper (CDM) maps SharePoint, Teams, and OneDrive as drive letters in Windows, in real time, without syncing whole libraries to every device. Dynamic: Custom, released on 9 November 2026, gives you control over what each of those drives contains.

What is a Dynamic: Custom drive?

A Dynamic: Custom drive is a drive you design yourself in Iris, our admin portal. It brings content from across Microsoft 365 together behind a single drive letter, so instead of handing people a row of drive letters, you give them one drive with exactly what they need.

You're not limited to one. You can create as many Dynamic: Custom drives as there are free drive letters in Windows.

What can a Dynamic: Custom drive contain?

Each Dynamic: Custom drive can hold up to 304 items:

• up to 100 SharePoint sites;
• up to 100 SharePoint document libraries;
• up to 100 shared OneDrives, colleagues' OneDrives that they've shared with the user;
• the user's own OneDrive;
• Dynamic: Teams, the Teams they belong to;
• Dynamic: SharePoint, the SharePoint sites they belong to;
• Dynamic: Shortcuts, the shortcuts they've added to their OneDrive.

What makes it dynamic?

A Dynamic: Custom drive isn't a fixed list of folders. Each one is built from several sources, and then personalised to every user based on their own permissions and their Teams and site memberships.

That means you can define one drive for a whole department or organisation, and each person sees only what's relevant to them and what they're allowed to open. When someone joins a Team or gets access to a new site, it appears in their drive. When they leave, it goes.

How often do Dynamic: Custom drives update?

Drives refresh on a schedule you choose. The default is every six hours, because permission lookups are expensive calls to Microsoft Graph, and a conservative schedule keeps you well clear of Microsoft's throttling. Some customers refresh every 20 minutes or less, and it works well for them.

What can you use it for?

Dynamic: Custom gives you complete control over what's in a drive, and just as importantly, what's out of it.

• Recreate a hub. Bring a SharePoint hub and all of its associated sites together as one drive.
• One drive per project. Give a project team its site, its document libraries, and everything else it needs behind one drive letter.
• One drive per department or business unit. Gather every site a team works across in one place.
• A single point of access. Build one drive with everything a person needs, rather than a long row of drive letters.
• Leave out what you don't need. A Dynamic: SharePoint drive shows every site someone belongs to. A Dynamic: Custom drive lets you choose exactly which ones appear, and filter out the rest.

If you're still deciding how to arrange content in SharePoint, read our guide to choosing between team sites, communication sites, and hub sites.

Who can use it, and what does it need?

Dynamic: Custom is included for every Cloud Drive Mapper customer, with no extra licence. Iris admins create and manage the drives, and that includes partners who manage customers through Central Command, the partner-facing view inside Iris.

It works with Cloud Drive Mapper 3.21 and later, so nearly every customer can start using it straight away, without upgrading.

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