In SharePoint timer job history I have noticed that there's the error in starting User Profile synchronization:

Could not connect to http://spsrv:5725/ResourceManagementService/MEX. TCP error code 10061: No connection could be made because the target machine actively refused it <ip-adress:port>.

In EventViewer there were some records like this:

Detection of product '{90140000-104C-0000-1000-0000000FF1CE}', feature 'PeopleILM', component '{1C12B6E6-898C-4D58-9774-AAAFBDFE273C}' failed.  The resource 'C:\Program Files\Microsoft Office Servers\14.0\Service\Microsoft.ResourceManagement.Service.exe' does not exist.

Error 10061 in Event Viewer

Error 10061 in Event Viewer

 

Solution.

Open services.msc. Be sure that both Forefront Identity Manager Service and Forefront Identity Manager Synchronization Service are started. Start them if they are stopped.

Start Forefront Identity Manager Service and Forefront Identity Manager Synchronization Service

Start Forefront Identity Manager Service and Forefront Identity Manager Synchronization Service