TOPIC: XE8 - iOS App Store Submission.

the key is getting the
CFBundleIdentifier
set correctly under project, options, version info
try replacing that
e.g
com.yourcompany.[appname]
make sure its exactly as your AP ID is named in itunes
and make when you set up the provisioning profile you selected the certificate with the correct company name too

Thanks for your response Brian.

Unfortunately the CFBundleIdentifier is not the problem. It is in fact getting past this point which I can confirm by putting in an incorrect bundle identifier, in which case I get error
[Warning] Unable to match bundle identifier "au.net.xxxxx" with AppID in all provisioning profiles

When I correct the the bundle identifier so that it matches, I get
[Warning] No certificate found in provisioning profile "xxxxAppStoreMay2015"

So it is finding the correct provisioning profile, matching the bundle ID but cannot see the certificate, which is definitely in the provisioning profile.

A similar issue reported here...
codeverge.com/embarcadero.delphi.deploym...store-provis/2031345
shows that one person regenerated with the profile and redownloaded, which fixed his problem.

I tried that, using a paired programmer to verify that I wasn't making any silly errors, and I still get exactly the same problem.
I have tried deleting certificates/profiles etc from keychains so that I am starting from scratch but I still cannot get past this point.

I feel your pain
I went through a similar excercise
and went around in circles for hours but eventually got all the ducks lined up correctly and then it worked :)

Still tearing my hair out over this. Has been days now.
Have found if I create a new 'ad hoc' profile for a different project I still get exactly the same error.
So it is recognising my development certificate, but not my distribution certificate!

Are there any embarcadero mobile experts out there who can suggest anything?

maybe post some screen shots of the different configurations...

another problem area is with the iOS entitlements (eg to the template)
there is a blog post about adding in more entitlements (use the IDE and not notepad.exe, i.e no carriage returns allowed)
i.e the 2 new lines to add are
<key>application-identifier</key>
<string>XXXXXXX.com.mycompany.myappname</string>