Send message to entire Group ( LDAP Issue )

[Mirza]

Hi, 

Friend i have few Queries appreciate if i get response quick... 

I have 2 Firewalls Fortigate 100D and 90D with FortiOS 5.4.0 one is in Head office and one in Branch, both are connected with Site to Site fortigate configuration, In Head Office on 100D device i have configure LDAP created groups for web filtering  everything is working fine, whereas from branch i can ping domain server i has configured LDAP on Branch 90D device i can see structure of Active directory and also i can fetch it and also  i have added groups which i have created for Web Filtering, some one suggested me that i need to install FSSO setup on active Directory i did but when i configure single sign inn on 90D device the status is showing disconnect can anyone please help me out there 

Appreciate quick response