Consider the following scenario:
You create an online meeting invitation from Microsoft Outlook on a computer that has Microsoft Lync 2010 installed.
You change the Location where most people dial in from setting in Meeting Options.
You send the invitation, and then you open the meeting schedule from the Outlook calendar.
In this scenario, you receive the following message:
Your online meeting invitation needs to be updated due to changed server policies. Clicking OK will update the invitation. Please review the online meeting options and then send the updated invitation to all participants.
Additionally, the dial-in number of the meeting is changed to the default dial-in number.
This issue occurs because the spaces before or after the region name are deleted incorrectly by Lync 2010 Add-in for Outlook.
To resolve this issue, install the following cumulative update:
2496325 Description of the cumulative update package for Lync 2010: April 2011
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.