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/

Hi,

This forum is for general questions and feedback related to Outlook. Since your question is more related to Exchange, I'd recommend you post it in the following forum:

https://social.technet.microsoft.com/Forums/office/en-US/home?category=exchangeserver

The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.

Steve Fan
TechNet Community Support