MSMQ queue summary

Table: Summary of MSMQ queues gives a brief description of what goes on to each of the Enterprise Vault queues. Here, server is the name of the server being processed by the Exchange Mailbox task, and queue is a number that uniquely identifies the queue.

Table: Summary of MSMQ queues

Queue name	Contains information about
Enterprise Vault Exchange Mailbox task for server queue A1	Pending items to update. Also failed operations.
Enterprise Vault Exchange Mailbox task for server queue A2	Individual items to process. Used for manual archive requests and whenever Enterprise Vault cannot directly communicate with the Storage Archive queue of the Storage service.
Enterprise Vault Exchange Mailbox task for server queue A3	Mailboxes to process. Used if you start archiving using the Run Now option in the Administration Console.
Enterprise Vault Exchange Mailbox task for server queue A4	Individual items to process. Only used for retries when Enterprise Vault cannot directly communicate with the Storage Archive queue of the Storage service.
Enterprise Vault Exchange Mailbox task for server queue A5	Mailboxes to process. Used during scheduled archive runs. This queue is not processed outside the scheduled archiving times, so you cannot use Run Now to clear a backlog on this queue.
Enterprise Vault Exchange Mailbox task for server queue A6	Requests to update folders with items that have been moved inside a mailbox. Enterprise Vault compresses the moved and copied item data that is placed in requests on queue A6. It also limits message storage on this queue to 100 MB. A compressed request to update 1,000 items occupies approximately 50 KB. So, about 2,000 requests can be placed on the queue. When the queue is full, further requests are rejected. These moved and copied items have to wait for another shortcut processing run.
Enterprise Vault Exchange Mailbox task for server queue A7	Synchronization requests.
Enterprise Vault Journaling task for server queue J1	Pending items to update. Also failed operations.
Enterprise Vault Journaling task for server queue J2	Items to process.
Enterprise Vault Journaling task for server queue J3	Instructs the Exchange Journaling task to examine the journal mailbox for new messages. Up to 500 new messages will be marked as archive pending, and a message is placed on queue J2 for each such message.
Enterprise Vault Journaling task for server queue J4	Synchronization requests.
Enterprise Vault Public Folder task for server queue P1	Pending items to update. Also failed operations.
Enterprise Vault Public Folder task for server queue P3	Folders to process. Used if you start archiving using the Run Now option in the Administration Console.
Enterprise Vault Public Folder task for server queue P5	Folders to process. Used during scheduled archive runs. This queue is not processed outside the scheduled archiving times, so you cannot use Run Now to clear a backlog on this queue.
Enterprise Vault Exchange Mailbox task for server queue R1	Notifications of item retrieval requests.
Enterprise Vault Exchange Mailbox task for server queue R2	Retrieval requests.
Enterprise Vault restore spool admin queue	Items that the Storage service has retrieved and that are now ready for the Exchange Mailbox task to process (for retrieval).
Enterprise Vault storage archive for exchangeserver	Items to be stored in vault stores.
Enterprise Vault storage restore for exchangeserver	Items to be retrieved from vault stores.