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Lightning Sync Validation Failure

Knowledge Article Number 000212705
Description Even though tests with the Remote Connectivity Analyzer ( pass the following error is shown when entering the "Exchange Service Account Credential" in the Lightning Sync Setup page.

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Resolution Possible Causes for this error:
  • User Name or Password are incorrect
  • Exchange server is not running in "Autodiscover" mode
  • Ports are not open on the local LAN or DMZ to allow the salesforce application to access Microsoft Exchange.

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