| Subject | English | Spanish |
| comp., MS | active mailbox | buzón activo (A mailbox that has been accessed at least once in the last 30 days) |
| comp., MS | active mailbox migration | migración de buzón activo (The stage during the e-mail migration when the migration service is actively provisioning new cloud-based mailboxes) |
| comp., MS | Active Mailbox Subscriptions | suscripciones de buzón activo (A counter that measures how many active mailbox subscriptions there are at a given time) |