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Security Alert on Outlook with Office 365 email

david kwock

Hi,

Our company using Office 365 email.

Sometimes we are getting an security alert from MS Outlook saying that "The security certificate was issued by a company you have not chosen to trust..." as attached below:

Please advise how to solve this issue on Sophos Firewall. Thank you!



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    We just started receiving the same message within the last few days across our 3 different UTM 9 devices.  We are only using URL Filtering not Decrypt & Scan.  Not sure what would have changed to cause this and we have been using almost exact same config for a year now.  Were you able to resolve this?

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    We just started receiving the same message within the last few days across our 3 different UTM 9 devices.  We are only using URL Filtering not Decrypt & Scan.  Not sure what would have changed to cause this and we have been using almost exact same config for a year now.  Were you able to resolve this?

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