Update AutoEnableArchiveMailbox parameter description

Author: chrisda

exchange/exchange-ps/exchange/Set-OrganizationConfig.md

@@ -861,8 +861,10 @@ Accept wildcard characters: False
 ### -AutoEnableArchiveMailbox
 This parameter is available only in the cloud-based service.
 
-When the AutoEnableArchiveMailbox parameter is enabled, an archive mailbox will be automatically provisioned when the primary mailbox reaches 90% of the quota (if licenses supports archiving). 
+The AutoEnableArchiveMailbox specifies whether an archive mailbox is automatically provisioned when the primary mailbox reaches 90% of the size quota (if licenses include archiving). Valid values are:
 
+- $true: An archive mailbox is automatically provisioned.
+- $false: An archive mailbox isn't automatically provisioned.
 
 ```yaml
 Type: Boolean