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Published 20 hours ago • verified publisher icon gautamsi

Invalid message signature: Basic realm="..."

Open bladerunner2020 opened this issue 3 years ago • 3 comments
trafficstars

Our customer has Exchange Server installed on-prem, ntlm auth.

When we do requests to EWS we get an error: Invalid message signature: Basic realm="mail.domain.com". Any ideas what could be a reason for that?

Kind regards, Alex

bladerunner2020 avatar Aug 23 '22 13:08 bladerunner2020

sorry not much idea about this error. seems like the negotiation is expecting specific realm name.

gautamsi avatar Aug 23 '22 16:08 gautamsi

I managed to repeat this error using Office365 Development Account. When I am trying to connect office365 Exchange with ntlm auth I am getting the same error.

bladerunner2020 avatar Aug 24 '22 04:08 bladerunner2020

you can not connect to O365 with ntlm, this is oauth only going forward

gautamsi avatar Aug 24 '22 04:08 gautamsi