| Event Id | 666 |
| Source | MSExchangeMTA |
| Description | The MTA work queue is backlogged with 600 messages in the queue. [MTA SUBMIT 18 231] (14) |
| Event Information | The work queue alarm may log two different events to notify the administrator when the work queue reaches a certain size. One event notifies the administrator that the work queue has reached the "alarm on" threshold. This warning is logged with the event ID
666. For more information click on the link given below. |
| Reference Links | MTA Logs Warning Events When Queues Reach Specified Sizes |
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