The UserSearchKey property returns a unique identifier that is used to compare user identities.
Access and Attendee objects
String
Read-only
The UserSearchKey property can be used to compare the identities of two users. It uniquely identifies the user.
For example, an application can compare a given user’s UserSearchKey property with the UserSearchKey property of all the attendees in an Attendees table to determine if the given user is among the attendees.
Note You should always set the UserDisplay, UserEntryId, and UserSearchKey properties. Failing to set all three of these properties can lead to unexpected results.
CreatorSearchKey
OwnerSearchKey
UserDisplay
UserEntryId