cannot use uploaded WC certificate for admin access

Question

hello, 
 i have an XG 16.5 MR4 and we bought a commercial wildcard certificate for the entire company domain and i can't select it for use. 
 first i uploaded the cert, it processes OK(the only thing is that the authority column marks a fail with "expected issuer xxxxx" although the value matches the issuer in the cert). 
 i then go to admin/admin settings and the only certificate in the dropdown is the "appliancecertificate". 
 
 edit: i can't even select it for SSL, checked after this post: https://community.sophos.com/products/xg-firewall/f/authentication/75698/how-to-change-the-admin-certificate 
 
 any ideas?

Mast_01 · Answer

i finally solved it myself, turns out the system was not taking the certificate as valid as it was expecting a different certification chain. 
 So i had to first import he intermediate certificate chain/authority and then readded the certificate. After that it worked.