| Event Id | 1016 |
| Source | MSExchangeIS |
| Description | Windows 2000 User <user name> logged on to <host name> mailbox, and is not the primary Windows 2000 account on this mailbox. |
| Event Information | No user action is required. |
| Reference Links | What is causing Event ID 1016 to be logged in my Application Event Log in Microsoft® Windows NT® 4.0 and Windows® 2000?. |
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