EventTracker KB --Event Id: 1024 Source: MSExchangeIS Public

Event Id	1024
Source	MSExchangeIS Public
Description	NT AUTHORITY\SYSTEM was unable to log on to the public store as NT AUTHORITY\SYSTEM.
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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