Technologies are described to increase a data limit for a user by introducing additional archive mailboxes as the original archive fills up or subsequently added archive mailboxes fill up. Thus, a user's data limit may be effectively removed through the use of additional archive mailboxes. In some examples, the additional mailboxes may be integrated into the architecture of the communication application such that their use is transparent to the user and/or an administrator of the communication application or associated service through the use of an application programming interface (API) that exposes a single multivalued strongly typed collection instead of dealing with multiple attributes and extending the schema every time a new type needs to be added. A mailbox locations attribute may act as the main storage of serialized mailbox locations and a mailbox identifier attribute may be used for indexing.