An asterisk * in the title indicates the field is mandatory.
If a field has a default value, it is shown in the Description column.
If the field type is an array, the Field Name has a .[n] suffix, where n is the array index placeholder.
Object and array field names are listed to provide context. If a field belongs to an object or an array, the full field name is shown in dot separated notation.

Title	Description	Details
CachedUserThreshold *	Specifies the maximum number of entries that can be held in the conversation history cache before the cleanup process is automatically invoked. The CacheUserThreshold property can be set to any integer value between 0 and 4294967295, inclusive; the default value is 1000000.	Field Name: CachedUserThreshold Type: Integer
UserCacheItemExpirationSeconds *	Number of seconds that an item can remain in the user cache before it is automatically deleted. If this value is not configured then cache items do not expire automatically. The expiration time can be set to any integer value between 0 and 86400 seconds, inclusive. The default value is 7200 seconds.	Field Name: UserCacheItemExpirationSeconds Type: Integer
UserCacheInvalidItemExpirationSeconds *	Number of seconds that an invalid item can remain in the user cache before it is automatically deleted. If this value is not configured then invalid cache items do not expire automatically. The expiration time can be set to any integer value between 0 and 86400 seconds, inclusive. The default value is 9999 seconds.	Field Name: UserCacheInvalidItemExpirationSeconds Type: Integer
ScopeClass		Field Name: ScopeClass Type: String
Element		Field Name: Element Type: String
EnableServerConversationHistory *	When set to True ($True), conversation histories and related information will be stored on the server. The default value is False, which means that this information is stored in user mailboxes.	Field Name: EnableServerConversationHistory Type: Boolean
Anchor		Field Name: Anchor Type: String
CachedUserCleanupPercentage *	Specifies the percentage of entries in the conversation history cache that will be processed each time cache cleanup is invoked. The cleanup percentage can be set to any integer value between 1 and 100, inclusive; the default value is 20.	Field Name: CachedUserCleanupPercentage Type: String
MaxContinuedConversationRetry *	PARAMVALUE: UInt32	Field Name: MaxContinuedConversationRetry Type: Integer
Identity	Unique Identity of the conversation history configuration settings. Because you can only have a single, global instance of these settings, you do not need to specify an Identity when calling the Get-CsConversationHistoryConfiguration cmdlet. If you prefer, however, you can use the following syntax to reference the global settings: -Identity "global"	Field Name: Identity Type: String

Model: device/skypeforbusiness/CsConversationHistoryConfiguration

Model Details: device/skypeforbusiness/CsConversationHistoryConfiguration