Refer to the above link and see that exchange needs to import adfs self-signed certificate, the default validity period is 30 days.
Set the validity period time command as Set-AdfsProperties -CertificateDuration <Days>
What is the maximum value that can be set?
If I have multiple adfs, do I need to import a certificate that trusts each adfs on the exchange?
If I import the trusted adfs certificate first, and then use the above command to update the validity time of the certificate, do I need to re-import and trust it on the exchange?

