OWA 2010 and Mail Tips

One of the most impactful Exchange 2010 Client Access features are Mail tips. There's a lot more info and examples of what they can do at the MS Exchange Team blog here:

http://msexchangeteam.com/archive/2009/04/28/451193.aspx

You configure Mail Tips via Powershell. These are organization level changes. You can view them using Get-OrganizationConfig and configure settings using Set-OrganizationConfig.

Unfortunately, the Exchange 2010 documentation does not at this time have documentation for each of these fields, but this is the link in case this posting dates it self.
http://technet.microsoft.com/en-us/library/aa997443(EXCHG.140).aspx

MailTipsExternalRecipientsTipsEnabled		Default: False This enables Mail Tips for reply/all including an outside the organization user
MailTipsLargeAudienceThreshold		Default: 25 This is the limit at which the "large audience" mail tip is displayed. Larger organizations will likely want to bump this number North.
MailTipsMailboxSourcedTipsEnabled		Default: True This is what controls if an auto-response or out of office appears as a mail tip.
MailTipsGroupMetricsEnabled		Default: True This is the service that does group metric counts for groups and nested groups
MailTipsAllTipsEnabled		Default: True This is the main setting to enable/disable mail tips entirely.

Additional things to know

• MailTips only work on Outlook 2010 (not yet released) and OWA 2010.
  
• Unfortunately, custom logic mail tips are not available in the upcoming Exchange 2010 release. The above options are the extent of MailTip customization