ACS Blog

How to Convert a Mailbox to a Room Resource Mailbox in Exchange Online

Who This Affects and What It Fixes

This guide is for small-business employees whose organization has an existing Microsoft Exchange Online mailbox that is being used to represent a physical room or shared space. Converting that mailbox to a Room Resource mailbox removes user-account licensing restrictions and enables the mailbox to appear as a bookable resource in your calendar so that anyone scheduling a meeting can search for it and check its availability.

What Is a Room Resource Mailbox?

A Room Resource mailbox is a special mailbox type in Exchange Online designed to represent a physical location such as a conference room. By default, it automatically accepts or declines calendar invites sent to it. It also becomes searchable in your calendar application as a resource, allowing attendees to check room availability before sending a meeting request.

Why Convert an Existing Mailbox Instead of Creating a New One?

Room Resource mailboxes are typically created fresh when a need arises. However, some organizations already have standard user mailboxes set up for the same purpose. Converting those existing mailboxes to the Room Resource type allows you to:

  • Avoid the licensing costs associated with standard user accounts.
  • Ensure the mailbox operates correctly as a calendar resource.

Steps to Request This Conversion

  1. Identify the existing mailbox that needs to be converted to a Room Resource mailbox.
  2. Confirm that the mailbox is intended to represent a physical room or bookable space, not an individual user.
  3. Contact your IT support team to submit a request for the conversion, providing the name and email address of the mailbox to be converted.
  4. Once converted, verify that the room appears as a searchable resource in your calendar application and that calendar invites sent to it are actioned automatically.

Need Help?

If you are a managed IT client and need assistance converting a mailbox to a Room Resource in Exchange Online, reach out to the support team at Advanced Computer Solutions.

Common questions

What happens to calendar invites sent to a Room Resource mailbox?

By default, a Room Resource mailbox will automatically accept or decline calendar invites sent to it. This default behavior can be changed if your organization requires manual approval of room bookings.

Does a Room Resource mailbox require a paid user license in Exchange Online?

No. One of the main reasons to convert an existing user mailbox to a Room Resource mailbox is to remove the licensing restrictions that apply to standard user accounts, helping reduce costs.

Can colleagues check a room’s availability before booking it?

Yes. Once a mailbox is converted to a Room Resource, it becomes available as a searchable resource inside your calendar application, allowing anyone in your organization to check whether the room is free before sending a meeting invite.