As in Source

In terms of what’s next for Exchange, Kevin briefly talked about features that will appear in Exchange 2010 SP2 later this year. Three major updates were discussed:

• Address Book Policies (ABPs), also known as “GAL segmentation”. This feature is described for Exchange 2007 in a white paper but Microsoft knew that the approach taken (ACLs) would break in the Exchange 2010 architecture, which indeed happened in Exchange 2010 SP1. ABPs follow the same route as other policies (OWA, ActiveSync, etc.) applied to mailboxes in that an administrator can create policies that establish what objects in the GAL can be viewed by a user. The default policy is equivalent to today’s GAL – you can see everything. But administrators can narrow things down by establishing policies that might restrict a user to only being able to see GAL objects that belong to a specific department or country and then apply that policy to mailboxes using EMC or PowerShell. In effect, address book policies create virtual views into the GAL that administrators can amend to meet company requirements. See the Exchange team blog for some more information.
• Device overload: Microsoft acknowledges that it’s difficult for administrators to know how well mobile devices work with Exchange and with the mass of clients that can connect to the server. Recent issues have occurred that caused recurring meetings to be deleted by some clients because of a lack of interoperability testing that might have surfaced the problem. A new ActiveSync testing lab is being established to help improve interoperability between devices produced by different vendors including RIM, Apple, Microsoft, and Android.
• Hybrid co-existence, aka rich co-existence. Kevin noted that “We do not expect large customers – over 2500 seats – to have everyone in the cloud all at once.” A hybrid deployment therefore requires the on-premise Exchange organization to be tailored so that it can share data effectively with Office 365. Today, some 46 individual settings have to be changed to make rich co-existence work well. Exchange 2010 SP2 includes a wizard that will reduce the number of settings that require administrator intervention to 6, so the process of establishing co-existence will be much simpler.