Event ID - 1219

Event Id1219
SourceMSExchangeIS Private
DescriptionLogon Failure - insufficient user account information.
Event InformationThe event ID 1219 is logged because OWA uses the Anonymous account permission assigned to a public folder. According to Microsoft:
The event ID 1219 is logged because OWA uses the Anonymous account permission assigned to a public folder. You can view this using the HTTP Protocol Properties dialog box in the Microsoft Exchange Server Administrator program. Click the HTTP (Web) Site Settings object in the Protocols container under the Configuration container, and click the Folder Shortcuts tab. Display the properties of the selected public folder, and click Client Permissions.
Reference LinksXWEB: Information Store Logs 1219 Events When Browsing Public Folders

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