The server certificate for instance ” has expired or is not yet valid.

Details
Product: Exchange
Event ID: 1057
Source: IMAP4SVC
Version: 6.5.6940.0
Component: Microsoft Exchange IMAP4 Service
Message: The server certificate for instance ‘<instance>‘ has expired or is not yet valid.
   
Explanation

Either this is the first day the certificate is valid, or the certificate has expired.

   
User Action

No user action is required if this is the first day the certificate is valid. If the certificate has expired, renew your certificate.

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