Outlook 2016 Certificate

Question

I have Sophos XG SFOS 17.0.1 MR-1 installed on a regular PC. 
 I am using Outlook 2016 to access my gMail via IMAP. 
 Every time I start the Outlook client, I get the message below and I have to click Yes. I have installed this certificate on every folder in User and Local Machine Cert Store. What can I do so that I dont get this Warning every time I start Outlook.

Thanks,

Aditya Patel · Answer

Hello edfggliese, 
 Please share with use the certificate by clicking on "View Certificate". I would also recommend adding in trusted root certificate under local machine profile.

Aditya Patel · Answer

Hello edfggliese, 
 Could you please confirm if the certificate is only stored under trusted root location under local machine profile and remove from other locations?

Aditya Patel · Answer

Hello edfggliese, 
 It does seem the certificate was not picked up when used with WindowsCertificate Manager. 
 Could you share the image again? It does seem the image is too small to understand the characters. 
 Ensure these steps are followed. 
 
 Open the Microsoft Management Console by typing "MMC" in the "Run" box. 
 Open Add or Remove Snap-ins by selecting FILE > ADD/REMOVE SNAP-IN... 
 Select Certificates from the list and click Add to display the Certificates Snap-in window. 
 Select the Computer Account and click Next . 
 Click Finish and close the list of snap-ins. 
 Click OK to add the certificates snap-in, which should now be visible in the Add/Remove Snap-ins window. 
 Expand the list of certificate containers, right click Trusted Root Authorities and choose All Tasks > Import to start Certificate Import Wizard. 
 Import the Certificate downloaded in step 2 using this wizard.