Intermediate SSL certificate on server

Bullrdrnm This seems like a server administration question rather than an F5 question. At face value they can import any CA certificates into the server CA store that they would like but should absolutely be validated with the server administrators before he does it.

HI Bullrdrnm , 
you Can extract the intermediate Certificate from the ( server / domain ) Certificate itself , and you can upload it to your Bigip in the same way of uploading any certificate and Key. 
After importing it in your appliance , you can add it in clientssl profile which you are using and put it in the chain field. 

if you need to extract the intermediate certificate , Follow the below Article : 

https://support.solarwinds.com/SuccessCenter/s/article/How-to-extract-the-Root-and-intermediate-certificates-from-the-certificate-bundle?language=en_US

If you need to install it in Bigip Follow the below Articles : 

https://my.f5.com/manage/s/article/K13302

https://www.digicert.com/kb/ssl-support/f5-big-ip.htm


if this doesn't meet your needs , you can explain more your deployment , to be able to help you.