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Code:
2020/10/21 04:00:01.152|924|0077|Excpt|Microsoft.Exchange.WebServices.Data.ServiceRequestException: The request failed. The SSL connection could not be established, see inner exception. The remote certificate is invalid according to the validation procedure.
---> System.Net.WebException: The SSL connection could not be established, see inner exception. The remote certificate is invalid according to the validation procedure.
---> System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.
Hello I get this error in the 3CXSystemService.log
The certificate is valid (from Globalsign):

The IIS / OWA certificate is 100% valid. The only thing which I did not add was the intermediate certificate because Windows and every browser and smartphone has the intermediate Globalsign anyway.
Any suggestions how to fix that? Could this be a chain error? Thanks
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Edit: ok sorry, its a routing problem, it goes trough a different gateway with different url / certificate (migration stuff like usual)
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