New answers tagged synchronisation
initially & during the first time configuring the user profile service application, SharePoint will ask you to select the synchronization instance for the SharePoint Farm and you will have to select only 1 machine in the farm even if you have multiple servers running!!
User profile service can be started on multiple server but user profile syncnorization service should be started on one server. Further u have to check the uls logs for the clue why it's stoped...also check event viewer.
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