There really is not enough information here to help.
What probe did this message come from?
This may be coming from a hub that has a tunnel setup and using an SSL certificate for the communication.
If this is the case then you will need to set up a new certificate and update all of the tunnel clients that use it.
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Gene Howard
Principal Support Engineer
Broadcom
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Original Message:
Sent: 09-28-2020 05:40 AM
From: Himanshu Agrawal
Subject: certificate error
Hi,
We are getting this alert "The certificate expires in 21 days on 10/08/2020 10:15:02". Can you let us know why this alert is generated and does it have anything to do with nimsoft ?