Indexing service does not start - Event ID 41293

Hello guys,

unfortunately since the weekend our indexing service is not willing to come up. It is failing with event ID 41293.
For sure there are a lot of possible solutions, but none of the troubleshooting digest seem to fit to our case.

https://support.symantec.com/en_US/article.TECH211545.html

We already restarted the service, the server and all further EV servers (3 servers in total, one for FSA, one for indexing, one for mail archiving), but there is no change.

An unexpected error has occurred.

Error Summary: Indexing Service start up error 
Error Details: The exception [rights-execute] was thrown. 
Reference: ServiceBaseEx::Run 
Stack Trace:    at KVS.EnterpriseVault.Runtime.WCF.WCFProxy`1.ReThrowAsTypedFaultExceptionIfAppropriate(FaultException faultEx)
   at KVS.EnterpriseVault.Runtime.WCF.WCFProxy`1.Invoke[TResult](Expression`1 method, String server)
   at KVS.EnterpriseVault.Runtime.WCF.WCFProxy`1.Invoke[TResult](Expression`1 method)
   at Symantec.EnterpriseVault.Indexing.Common.IndexingWCFProxy`1.Invoke[TResult](Expression`1 method)
   at Symantec.EnterpriseVault.Indexing.IndexingEngine.Index EngineProxy.RepositoryListXml()
   at Symantec.EnterpriseVault.Indexing.IndexingEngine.Index EngineIndexingEngine.GetIndexVolumeNames(Boolean filterInvalidNames)
   at Symantec.EnterpriseVault.Indexing.Admin.IVMetadataSync.PerformSync(String metadataPath, Boolean isCompleteSync)
   at Symantec.EnterpriseVault.Indexing.Admin.IndexingEngineMonitor.PerformIVMetadataSynchronization(IndexAdminService indexAdminservice)
   at KVS.EnterpriseVault.Common.ServiceBaseEx.ContinueOrAbortStartup(Action action)
   at Symantec.EnterpriseVault.Indexing.Admin.IndexAdminService.OnPerformStartup(Boolean HotRestart)
   at KVS.EnterpriseVault.Common.ServiceBaseEx.Run() 

For more information, see Help and Support Center at http://entced.symantec.com/entt?product=ev&language=english&version=10.0.4.0&build=10.0.4.1189&error=V-437-41293

Does anyone of you got an idea about this?

Thanks in advance for your help.

Kind regards,
Christian