We are seeing the following on our Exchange 2016 server, but no certificates appear to be missing:
Log Name: Application
Source: MSExchange OAuth
Date: 10/03/2020 11:00:34
Event ID: 2004
Task Category: Configuration
Level: Warning
Keywords: Classic
User: N/A
Computer: server.domain.local
Description:
Unable to find the certificate with thumbprint E41EF5EA60A68FA5FEA50D2D2C44A31DF6E26DE1 in the current computer or the certificate is missing private key. The certificate is needed to sign the outgoing token.
Event Xml:
2004
3
2
0x80000000000000
14842696
Application
server.domain.local
E41EF5EA60A68FA5FEA50D2D2C44A31DF6E26DE1