When I try grant mailbox access to DL and Security Group.

I have realised most DL and security group next to it a red cross icon.

I have tried the below link but not working. Anyone can share what its means actually.
Is there any further impact?

http://support.risualblogs.com/blog/2011/08/26/outlook-2010-cannot-add-group-for-permissions-one-or-more-users-cannot-be-added-to-the-folder-access-list-non-local-users-cannot-be-given-rights-on-this-server/

Are they universal security groups?

Hi,

Do you have follow below link for troubleshooting?
http://blogs.msdn.com/b/pepeedu/archive/2010/08/26/how-to-upgrade-a-universal-distribution-group-to-a-universal-security-group.aspx

How about create a new USG to test?

Same Problem here. Finally got it fixed the following way.

- Did all the steps according to http://blogs.msdn.com/b/pepeedu/archive/2010/08/26/how-to-upgrade-a-universal-distribution-group-to-a-universal-security-group.aspx

As this did not work out for me, I converted the Security Group back to a Distribution Group in ADUC and run the following command in the Exchange Management Shell afterwards:

Set-Distributiongroupidentity <DistributionGroupIdParameter> MemberJoinRestriction Closed

Then I tried to convert the Distribution Group to a Security Group again, using ADUC and the PowerShell Command:
Set-Distributiongroupidentity <DistributionGroupIdParameter> MemberDepartRestriction Closed

And now - finally - I am able to use this Group in Outlook and Exfolders to assign proper permission to Exchange objects.

So make sure you have set the MemberJoinRestriction of your Distribution Group to closed before converting it to a Security Group.  

• Edited by Christian Baracchi 21 hours 57 minutes ago
• Proposed as answer by Christian Baracchi 21 hours 47 minutes ago