>Is there a way to disable warnings for certificate expiration such as:
>
>"Certificate for local system with Thumbprint 01 02 8a 9e 35 4c 1d 32 99 19 17 31 e2 b6 20 15 a0 a1 82 35 is about to expire or already expired."
>
>This is from Microsoft-Windows-CertificateServicesCli.

Even if it's possible to disable the warnings it's a bad idea to do so, those warnings are there for a good reason.

There are several possibilities:

1. The cert is obsolete/no longer in use. In that case it can simply be removed/deleted from your certificate store and/or detached from services such as Exchange, and the warnings will stop

2. The cert is required/actively used:

2a. It is about to expire. To avoid possible interruption to services it should be renewed ASAP, by default you only start getting these warnings in the last 30 days of the cert. It's relatively easy to renew a required cert. It is much more difficult to get a replacement cert for one that has already expired, and then attach that cert to the various services that require it

2b. The cert has expired. Depending on its importance this can cause service failures (e.g. e-mail delivery) or will force Windows to fall back to less secure or insecure transport methods. This fallback procedure may cause timeouts or delays, so will manifest as decreased performance

Maybe there are obsolete certs (#1 above) causing these warnings. If so deal with it/them. You don't want to disable these warnings because you don't want to miss legitimate warnings for required certs.