Hi safekick_jk,
This is Neo Zhu from Office365 support. I’m glad to help you in this case. Do you mean you can’t check the GAL with Outlook 2011 client (global address list) ?
In Office365, Outlook2011 uses EWS to connect the mailbox and get the GAL information. To make sure we can get the GAL information , please check the following steps:
1, Setup Outlook 2011 with mailbox help.outlook.com/.../gg471164.aspx
2, Make sure there is no firewall , anti-virus or anti-spam service block the port 443 of the computer.
By the way, did the problem only occur on the Mac user? For your question , Currently, there is no LDAP Directory server we can use to query the GAL information.
Thanks,
Neo Zhu