| Subject | English | Spanish |
| comp., MS | Active Mailbox Subscriptions | suscripciones de buzón activo (A counter that measures how many active mailbox subscriptions there are at a given time) |
| comp., MS | mailbox subscription | suscripción de buzón de correo (Metadata specifying that a user is logged on their e-mail account. After the user has successfully logged on, the mailbox subscription is considered active) |