| Event Id | 1016 | | Source | MSExchangeIS Mailbox | | Description | NT User NT AUTHORITY\SYSTEM logged on to <system mailbox>, and is not the primary Windows NT account on this mailbox.
| | Event Information | According to Microsoft:
You may see the preceding events even though the information store service starts. You need to mount the databases:
1. Start Exchange System Manager.
2. Expand Servers, expand Servername, and then expand First Storage Group.
3. Right-click the Mailbox Store, and then click Mount Store.
4. Right-click Public Folder Store, and then click Mount Store.
| | Reference Links | Event IDs When Starting the Information Store with Blank Databases
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