The September 2015 updates for Outlook 2010 are sparse (and will remain sparse going forward as the end of mainstream support is October 13, 2015. Extended support ends in July 2020).
You will now receive a warning when you try to change Default or Anonymous permissions. The warning message looks something like this: Changes you make to Default or Anonymous permissions will apply to all users. Are you sure you want to change these permissions?
When you try to change the members of a distribution list that has multiple Exchange profiles set, you receive the following error message: The public group cannot be displayed. The operation failed.
This update can be downloaded at September 8, 2015, update for Outlook 2010 (KB3085522)
