Error while setting up AAD Sync

Question

While trying to install Microsoft Entra Connect I keep getting the following error "An error occurred executing Configure AAD Sync task: An error occurred while sending the request." during the final install stages. I have looked at the logs and have located this error.

"Exception Data (Raw): System.Management.Automation.CmdletInvocationException: An error occurred while sending the request. ---> Microsoft.IdentityManagement.PowerShell.ObjectModel.SynchronizationConfigurationValidationException: An error occurred while sending the request.

at Microsoft.DirectoryServices.MetadirectoryServices.UI.WebServices.MMSWebService.ValidateConfigurationParameters(Connector connector)

at Microsoft.DirectoryServices.MetadirectoryServices.UI.WebServices.MMSWebService.CreateConnector(Connector connector, Boolean validate)

at Microsoft.IdentityManagement.PowerShell.Cmdlet.AddADSyncConnectorCmdlet.ProcessRecord()"

Any ideas on a possible solution? I do have MFA disabled for the Sync account that is created in Entra during install.

Answer 1

Thanks for your question.

This is likely as a result of TLS 1.2 not being selected and used by Connect. Run the script below to enforce this:

https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/reference-connect-tls-enforcement#powershell-script-to-enable-tls-12

The above should fix the issue.

A lesser possibility is if you have a proxy. In that case see: https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/tshoot-connect-connectivity#connectivity-issues-in-the-installation-wizard

You can mark it 'Accept Answer' and 'Upvote' if this helped you

Regards,

Abiola