Filed to initialize session with document engine: Unable to resolve Contentdistributor

Error Message in event viewer
Failed to connect to servername.domain.com:13391 Failed to initialize session with document engine: Unable to resolve Contentdistributor.

I got this error log several times. One is from Office Web Apps installation.
I installed FAST for SharePoint before deploying OWA. after that i got this error.
the other one I think it occurs after FAST and SharePoint Server were migrated to a new server using vMotion.

Solution.
Just reinstall FAST Certificate into SharePoint Server again follow the step in the below link.
Configure SSL enabled communication

then restart both FAST and SharePoint server.

Cheers

Unable to connect to Synchronization Services

Synchronization Services Manager use for verify SharePoint User Profile Synchronization is work but some people may get this error when start this application.

Unable to Connect to the Synchronization Service
Some possible reasons are:
1.The service is not started.
2.Your account is not a member of a require security group.

Solution:
1.make sure that 2 FIM Services in Synchronization Server is running.



2.make sure that your current user is in FIMSyncOperators group. if not add your user account then log off and log on.



After that, you should be able to access this application.


Cheers.