EdgeSync service cannot connect to this subscription because of error “The LDAP server is unavailable”

You configure the EdgeSynchronization in the Exchange 2010 environment but having issues with edge sync and getting following events on the HUB servers. Log Name:      Application Source:        MSExchange EdgeSync Date:          ******** Event ID:      1024 Task Category: Topology Level:         Error Keywords:      Classic User:          N/A Computer:      ********** Description: Failed to connect to the…

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Mailflow issue from Exchange On-Prem to Office 365

You are on Exchange Hybrid environment and sending emails to Office 365 via specific SendConnector which has TlsCertificateName attribute configured and EOP is doing certificate validation for Inbound SMTP connections. You might see any of the following errors in the queue/Protocol Logs. –> 454 4.7.5 The certificate specified in TlsCertificateName of the SendConnector could not be found….

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