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Exchange Hybrid connector validation from o365 to on-prem
We recently setup Exchange Hybrid on Classic mode. Completed without errors. During setup we ensure that the Transport Certificate is valid and we assigned our 3rd party cert. We checked on IIS ...
Mail flow is secured via the send and receive connectors, so view the cert names with get-sendconnector and get-recieveconnector for the on-prem Exchange and make sure the correct ones are assigned