Regarding an IBM Technote there´s an issue when deleting a person from the Domino Directory via an AdminP request by selecting “Delete the mail database on the user’s home server” and the option “Delete mail replicas on all others server”.
There are 2 workaround mentioned in the TechNote:
1) Restore the person document from backup and re-delete them without checking the “other replicas” option or
2) Use the “Add Person” form action to add a ‘stub’ person (i.e. do not register the user). Putting in the user name and mail file info (Domain, mail server, mail file) and then re-deleting them without checking the “other replicas” option. Both options require that any other replicas of the mail file have to be deleted manually.