Event ID - 3051

Event Id3051
SourceMSExchangeIS Public
DescriptionThe unused site folder (1b4-7) NON_IPM_SUBTREE\SCHEDULE+ FREE BUSY\EX:/o=ORGANIZATION/ou=SITE-NAME was deleted.
Event InformationAccording to Microsoft:
A process within the information store compares a sorted list of Exchange Server sites (obtained from the directory) to a sorted list of Exchange Server sites present in the public information store (obtained by a query to the information store). These two lists are not sorted by the same string comparison operation, which results in two lists that differ slightly (usually a difference which affects sites with special characters, such as the hyphen character).
To resolve this problem, obtain the latest service pack for Exchange Server 5.5.Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.
Reference LinksXADM: Site Folders Deleted for Exchange Sites That Exist in the Directory

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