![Dealing with a Missing Microsoft Exchange Server Auth Certificate that Causes “Federation or Auth certificate not found” Warnings | Alexander's Blog Dealing with a Missing Microsoft Exchange Server Auth Certificate that Causes “Federation or Auth certificate not found” Warnings | Alexander's Blog](https://www.zubairalexander.com/blog/wp-content/uploads/2015/06/EventID_2005.png)
Dealing with a Missing Microsoft Exchange Server Auth Certificate that Causes “Federation or Auth certificate not found” Warnings | Alexander's Blog
![User Guide for AsyncOS 13.5 for Cisco Cloud Email Security - LD (Limited Deployment) - Automatically Remediating Messages in Mailboxes [Cisco Cloud Email Security] - Cisco User Guide for AsyncOS 13.5 for Cisco Cloud Email Security - LD (Limited Deployment) - Automatically Remediating Messages in Mailboxes [Cisco Cloud Email Security] - Cisco](https://www.cisco.com/c/dam/en/us/td/i/400001-500000/410001-420000/416001-417000/416104.jpg)
User Guide for AsyncOS 13.5 for Cisco Cloud Email Security - LD (Limited Deployment) - Automatically Remediating Messages in Mailboxes [Cisco Cloud Email Security] - Cisco
Why do I get the error “This certificate is invalid for use with Exchange – Reason: Private key missing”?
![Dealing with a Missing Microsoft Exchange Server Auth Certificate that Causes “Federation or Auth certificate not found” Warnings | Alexander's Blog Dealing with a Missing Microsoft Exchange Server Auth Certificate that Causes “Federation or Auth certificate not found” Warnings | Alexander's Blog](https://www.zubairalexander.com/blog/wp-content/uploads/2015/06/ExchangeAuthCert.png)