Hi,
Thank you for posting in Microsoft Q&A forum.
This iOSProfileSigning certificate is only needed to install the management profile on iOS devices during the enrollment process. After the enrollment is done, this certificate is not used anymore.
So what you will see is that devices that are already are enrolled will work as expected. And newly enrolled devices will receive an iOSProfileSigning certificate with the new date.
Similar threads for your reference:
IOSProfileSigning cert expiring on March 26th? No worries!
Does anyone know what the IOSProfileSigning.manage.microsoft.com cert is?
Thanks for your time. Have a nice day!
Best regards,
Simon
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