how many network certificate I can install for 1 iphon or ipad? how can I check it is installed successfuly

hi ..

I have a email certificate in my profile for recieving my compmay email, when I login to company office Wifi, it ask me to accept a network certificate , I did accept it , but I can't find it in profile. My questiosn are:

1) How can I check whether I install certificate successfully ?

2) How many certificate I can install on 1 iphone or iPad ?

Thanks

Peter