First retrieve what is currently logged on a specific server. You can retrieve this information as follows :

Get-EventLoglevel -server Servername

This will retrieve a list similar to this :

MSExchange ActiveSync\Requests                                       Lowest
MSExchange ActiveSync\Configuration                                  Lowest
MSExchange Antispam\General                                          Lowest
MSExchange Assistants\Assistants                                     Lowest
MSExchange Autodiscover\Core                                         Lowest
MSExchange Autodiscover\Web                                          Lowest
MSExchange Autodiscover\Provider                                     Lowest
MSExchange Availability\Availability Service                         Lowest
MSExchange Availability\Availability Service General                 Lowest
MSExchange Availability\Availability Service Authentication          Lowest
MSExchange Availability\Availability Service Authorization           Lowest
MSExchange Cluster\Move                                              Lowest
MSExchange Cluster\Upgrade                                           Lowest
MSExchange Cluster\Action                                            Lowest
MSExchange Common\General                                            Lowest
MSExchange Common\Configuration                                      Lowest
MSExchange Common\Logging                                            Lowest
MSExchange Extensibility\Transport Address Book                      Lowest
MSExchange Extensibility\MExRuntime                                  Lowest
MSExchange EdgeSync\Synchronization                                  Lowest
MSExchange EdgeSync\Topology                                         Lowest
MSExchange EdgeSync\SyncNow                                          Lowest
MSExchange TransportService\TransportService                         Lowest
MSExchange Web Services\Core                                         Lowest
MSExchange IMAP4\General                                             Lowest
MSExchange Messaging Policies\Journaling                             Lowest
MSExchange Messaging Policies\AttachFilter                           Lowest
MSExchange Messaging Policies\AddressRewrite                         Lowest
MSExchange Messaging Policies\Rules                                  Lowest
MSExchange Messaging Policies\Prelicensing                           Lowest
MSExchange Anti-spam Update\HygieneUpdate                            Lowest
MSExchange Management Application\Shell                              Lowest
MSExchange Management Application\Console                            Lowest
MSExchange OWA\FormsRegistry                                         Lowest
MSExchange OWA\Core                                                  Lowest
MSExchange OWA\Configuration                                         Lowest
MSExchange OWA\Themes                                                Lowest
MSExchange OWA\SmallIcons                                            Lowest
MSExchange OWA\Proxy                                                 Lowest
MSExchange OWA\Transcoding                                           Lowest
MSExchange OWA\ADNotifications                                       Lowest
MSExchange POP3\General                                              Lowest
MSExchange Process Manager\ProcessManager                            Lowest
MSExchange Repl\Service                                              Lowest
MSExchange Repl\Exchange VSS Writer                                  Lowest
MSExchange Search Indexer\General                                    Lowest
MSExchange Search Indexer\Configuration                              Lowest
MSExchange Store Driver\General                                      Lowest
MSExchange System Attendant Mailbox\General                          Lowest
MSExchange Topology\Topology Discovery                               Lowest
MSExchange ADAccess\General                                          Lowest
MSExchange ADAccess\Cache                                            Lowest
MSExchange ADAccess\Topology                                         Low
MSExchange ADAccess\Configuration                                    Lowest
MSExchange ADAccess\LDAP                                             Lowest
MSExchange ADAccess\Validation                                       Low
MSExchange ADAccess\Recipient Update Service                         Lowest
MSExchange ADAccess\Site Update                                      Lowest
MSExchangeAL\Ldap Operations                                         Lowest
MSExchangeAL\Service Control                                         Lowest
MSExchangeAL\Attribute Mapping                                       Lowest
MSExchangeAL\Account Management                                      Lowest
MSExchangeAL\Address List Synchronization                            Lowest
MSExchangeIS\9000 Private\Transport General                          Lowest
MSExchangeIS\9000 Private\General                                    Lowest
MSExchangeIS\9000 Private\Transport Sending                          Lowest
MSExchangeIS\9000 Private\Transport Delivering                       Lowest
MSExchangeIS\9000 Private\Transfer Into Gateway                      Lowest
MSExchangeIS\9000 Private\Transfer Out Of Gateway                    Lowest
MSExchangeIS\9000 Private\MTA Connections                            Lowest
MSExchangeIS\9000 Private\Logons                                     Lowest
MSExchangeIS\9000 Private\Access Control                             Lowest
MSExchangeIS\9000 Private\Send On Behalf Of                          Lowest
MSExchangeIS\9000 Private\Send As                                    Lowest
MSExchangeIS\9000 Private\Rules                                      Lowest
MSExchangeIS\9000 Private\Storage Limits                             Lowest
MSExchangeIS\9000 Private\Background Cleanup                         Lowest
MSExchangeIS\9000 Private\DS Synchronization                         Lowest
MSExchangeIS\9000 Private\Views                                      Lowest
MSExchangeIS\9000 Private\Download                                   Lowest
MSExchangeIS\9000 Private\Local Replication                          Lowest
MSExchangeIS\9001 Public\Transport General                           Lowest
MSExchangeIS\9001 Public\General                                     Lowest
MSExchangeIS\9001 Public\Replication DS Updates                      Lowest
MSExchangeIS\9001 Public\Replication Incoming Messages               Lowest
MSExchangeIS\9001 Public\Replication Outgoing Messages               Lowest
MSExchangeIS\9001 Public\Replication NDRs                            Lowest
MSExchangeIS\9001 Public\Transport Sending                           Lowest
MSExchangeIS\9001 Public\Transport Delivering                        Lowest
MSExchangeIS\9001 Public\MTA Connections                             Lowest
MSExchangeIS\9001 Public\Logons                                      Lowest
MSExchangeIS\9001 Public\Access Control                              Lowest
MSExchangeIS\9001 Public\Send On Behalf Of                           Lowest
MSExchangeIS\9001 Public\Send As                                     Lowest
MSExchangeIS\9001 Public\Rules                                       Lowest
MSExchangeIS\9001 Public\Storage Limits                              Lowest
MSExchangeIS\9001 Public\Replication Site Folders                    Lowest
MSExchangeIS\9001 Public\Replication Expiry                          Lowest
MSExchangeIS\9001 Public\Replication Conflicts                       Lowest
MSExchangeIS\9001 Public\Replication Backfill                        Lowest
MSExchangeIS\9001 Public\Background Cleanup                          Lowest
MSExchangeIS\9001 Public\Replication Errors                          Lowest
MSExchangeIS\9001 Public\DS Synchronization                          Lowest
MSExchangeIS\9001 Public\Views                                       Lowest
MSExchangeIS\9001 Public\Replication General                         Lowest
MSExchangeIS\9001 Public\Download                                    Lowest
MSExchangeIS\9001 Public\Local Replication                           Lowest
MSExchangeIS\9002 System\Recovery                                    Lowest
MSExchangeIS\9002 System\General                                     Lowest
MSExchangeIS\9002 System\Connections                                 Lowest
MSExchangeIS\9002 System\Table Cache                                 Lowest
MSExchangeIS\9002 System\Content Engine                              Lowest
MSExchangeIS\9002 System\Performance Monitor                         Lowest
MSExchangeIS\9002 System\Move Mailbox                                Lowest
MSExchangeIS\9002 System\Download                                    Lowest
MSExchangeIS\9002 System\Virus Scanning                              Lowest
MSExchangeIS\9002 System\Exchange Writer                             Lowest
MSExchangeIS\9002 System\Backup Restore                              Lowest
MSExchangeIS\9002 System\Client Monitoring                           Lowest
MSExchangeIS\9002 System\Event History                               Lowest
MSExchangeIS\9002 System\Database Storage Engine                     Lowest
MSExchangeMailboxAssistants\Service                                  Lowest
MSExchangeMailboxAssistants\OOF Assistant                            Lowest
MSExchangeMailboxAssistants\OOF Library                              Lowest
MSExchangeMailboxAssistants\Resource Booking Attendant               Lowest
MSExchangeMailboxAssistants\Email_Lifecycle_Assistant                Lowest
MSExchangeMailSubmission\General                                     Lowest
MSExchangeMU\General                                                 Lowest
MSExchangeSA\Clean Mailbox                                           Lowest
MSExchangeSA\NSPI Proxy                                              Lowest
MSExchangeSA\RFR Interface                                           Lowest
MSExchangeSA\OAL Generator                                           Lowest
MSExchangeSA\Proxy Generation                                        Lowest
MSExchangeSA\RPC Calls                                               Lowest
MSExchangeSA\RPC-HTTP Management                                     Lowest
MSExchangeTransport\SmtpReceive                                      Lowest
MSExchangeTransport\SmtpSend                                         Lowest
MSExchangeTransport\DSN                                              Lowest
MSExchangeTransport\Routing                                          Lowest
MSExchangeTransport\Logging                                          Lowest
MSExchangeTransport\Components                                       Lowest
MSExchangeTransport\RemoteDelivery                                   Lowest
MSExchangeTransport\Pickup                                           Lowest
MSExchangeTransport\Categorizer                                      Lowest
MSExchangeTransport\PoisonMessage                                    Lowest
MSExchangeTransport\MessageSecurity                                  Lowest
MSExchangeTransport\TransportService                                 Lowest
MSExchangeTransport\Exch50                                           Lowest
MSExchangeTransport\Process                                          Lowest
MSExchangeTransport\ResourceManager                                  Lowest
MSExchangeTransport\Configuration                                    Lowest
MSExchangeTransport\Storage                                          Lowest
MSExchangeTransport\Agents                                           Lowest
MSExchangeFDS\General                                                Lowest
MSExchangeFDS\FileReplication                                        Lowest

 To change the value of the logging, use the Set-EventlogLevel in the Exchange Command-shell.

For example:

Set-EventLogLevel “Servername\MSExchangeSA\OAL Generator” -Level High

Set-eventloglevel -Identity ECIdParameter -Level Lowest | Low | Medium | High | Expert [CommonParameters]

Also see this article on how to enable logging for the Microsoft Transport Suite for Domino.