Hi... i have a Proble in Exchange. after install CAS and HUB Role , when i open EMC , this error appear: Initialization Failed. the followinf Error occured when retireving user information For Domain\Administrator Unexpected Error (0x160CB030) While Executing Command 'Get-LinkedRoleGroupForLogonUser' I Searched Web , and i did not find solution that solve my problem. please help me. thanks.

See: http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/925bbac0-8eaf-4097-ab12-40a143397b76/ and http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/b35e3665-7e85-42cf-a166-6e79117b8634/ Make sure all your servers are running the same SP and RU level.

Dear A_D_Northwind Traders i Checked first link in advance and my broblem did not solved. i updated OS ( do second Link) , i get Error agein and it could not solve my problem .