AAD sync failure with Azure AD connector

Question

When configuring Azure AD Connect, the configuration fails with the message "An error occurred executing Configure AAD Sync task: An error occurred while sending the request". In the trace log, I repeatedly observe the following error log:

[ 41] [ERROR] Creation of connector [Domain_Name].onmicrosoft.com - AAD failed. This may be due to replication delay. Retrying after 5 seconds ...

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()

I didn't find anything online on how to resolve this and any help regarding it would be appreciated.

Answer 1

Try to ensure Entra Connect uses TLS 1.2 by enabling it:

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

Also see a similar issue here:

https://learn.microsoft.com/en-us/answers/questions/1219034/ad-azure-connect-installation-response-status-code?cid=kerryherger

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

Regards,

Abiola