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The Virtru for Outlook 365 add-in can be used both with personal accounts and within delegated and shared mailboxes. However, there are a few prerequisites for use in both scenarios.

Platform specific prerequisites

OWA

For full compatibility, use the Open another mailbox function to access the Shared or Delegated Mailbox directly.

We suggest that users do not use Virtru when accessing content via the Add shared folder functionality.

Mailbox type prerequisites

Delegated access to another user's mailbox

When a user has delegated access to another user's mailbox, they typically cannot manage add-in installations. So, if the add-in has not already been installed on the account, the delegatee will not be able to add and use Virtru.

In order to use Virtru in the delegated mailbox, the add-in must be installed by the mailbox owner or deployed by an admin.

Access to a shared mailbox

In order to use Virtru in a shared mailbox, the add-in must be deployed by an admin.

When a user has access to a shared mailbox, they typically cannot manage add-in installations. So, if the add-in has not been deployed to the account, the end-user will not be able to add and use Virtru.

Additionally, the organization's add-in manifest must be on version 1.17.0 or above. Details on checking and updating the manifest can be found here: 1.17.0 Release - Update required for Shared Mailbox support