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I got my new printer yesterday and setting it up was like a breeze. After that I tried to print, but the macOS Printer dialog told me: "Certificate expired".

I searched the internet and immediately found out, that I could check my self signed certificate. Renewed everything but still the same. Unable to print from the Mac.

I tried to print from the iPhone, worked, with a question if this is a secure connection, but it worked.

Back on my MAc still the same. I logged in the EWS again an additionally added the certificate of the printer(EWS page) to my keychain and changed it to fully trust. 

I'm frustrated and on top of this, the printer makes a high pitch noise in my quiet office 😞 

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