Description

Veritas Alta Archiving requires usernames, email addresses and aliases to be unique. No two users can have the same username, email address or alias .

In the event that a username, primary email address of alias needs to be assigned to another account, it must first be removed from the current account.

Solution

The solution depends on the configuration under User Management.

If configured to Manage account provisioning using the console application, the account will need to be edited in the Management Console:

In the left navigation pane, click Account Management.

In the accounts list, click the account that needs to be edited, to display the details of the account.
To edit the details, at the bottom-right of the account details page, click Edit.

Update the username and email address fields as needed.
If an alias needs to be removed for use on another account, click the X next to the alias, under Archive Aliases

A star is displayed next to the primary address which cannot be deleted.  

Click Save to save the changes.

Note: If account provisioning is managed remotely with CloudLink or with Office 365 Sync, some of the account details cannot be updated from within the Admin Portal.
To update a user with CloudLink, a Disable task must be used.
To update a user with an O365 Sync task, the O365 license must be removed, and then run a sync task.

For both, CloudLink and O365 sync, if an alias needs to be deleted, that alias must be removed from the AD or O365 account, prior to running the sync tasks. Once an alias is removed from the AD or O365 account, the sync will remove the alias from the archive account, enabling it to be assigned to another account. Once this is done, the alias can then be added to another AD or O365 account, and synchronized to the cloud.