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The HTTP request was forbidden with client authentication scheme ‎’Negotiate‎’

Exchange Server 2016 Hybrid Server , Hybrid remote move Migration Error.

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Error: MigrationTransientException: The call to ?’https://mail.careexchange.in/EWS/mrsproxy.svc?’ failed. Error details: The HTTP request was forbidden with client authentication scheme ?’Negotiate?’. –> The remote server returned an error: ?(403)? Forbidden.. –> The call to ?’https://mail.careexchange.in/EWS/mrsproxy.svc?’ failed. Error details: The HTTP request was forbidden with client authentication scheme ?’Negotiate?’. –> The remote server returned an error: ?(403)? Forbidden.. –> The HTTP request was forbidden with client authentication scheme ?’Negotiate?’. –> The remote server returned an error: ?(403)? Forbidden.
Report: anon@careexchange.in

Make sure MRS Proxy is Enabled.

Get-WebServicesVirtualDirectory –identity SERVERNAME\EWS (Default Web Site) | FL MrsProxy*

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To Enable

Set-WebServicesVirtualDirectory –identity SERVERNAME\EWS (Default Web Site)  -MRSProxyEnabled $true

To Disable

Set-WebServicesVirtualDirectory –identity SERVERNAME\EWS (Default Web Site)  -MRSProxyEnabled $false

In my case MRS Proxy is already Enabled. Enabling Basic Authentication on Web Services Virtual Directory resolved the issue.

Set-WebServicesVirtualDirectory –identity SERVERNAME\EWS (Default Web Site) -BasicAuthentication $TRUE

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Satheshwaran Manoharan
Satheshwaran Manoharanhttps://www.azure365pro.com
Award-winning Technology Leader with a wealth of experience running large teams and diversified industry exposure in cloud computing. From shipping lines to rolling stocks.In-depth expertise in driving cloud adoption strategies and modernizing systems to cloud native. Specialized in Microsoft Cloud, DevOps, and Microsoft 365 Stack and conducted numerous successful projects worldwide. Also, Acting as a Technical Advisor for various start-ups.

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