"looks like pop settngs on my mobile phone but IMAP on the desktop. Does this affect functions?"
It's not to be recommended that's for sure but it's not what's causing your problem.
IMAP is the better option because it synchronises all your email folders whereas POP3 simply downloads incoming emails to your device. With POP3 it means that any emails you send from your mobile do not get copied back to your VM webmail account on the VM website or to your Outlook folders on the Desktop.
Having both protocols on the same email account can cause problems for POP3. For example, the situation can arise where IMAP in Outlook may have downloaded a new email to Outlook and when you next use your mobile phone POP3 assumes it does not have to download that email because it has already been downloaded by IMAP. Therefore you will never see that email in your inbox on your mobile.
If you used IMAP on both devices you would be able to see all your emails, sent and received on both devices. Currently your mobile is not picking up on any messages you send from Outlook or those sent directly from your VM webmail account on the VM website. However. it's your choice which protocol you use.
(By the way POP3 and IMAP are international standards used by all email services, they are not specific to Virgin Media.)
"'Synchronizing subscribed folders for removed reported error (0x800CCC0E) : 'Outlook cannot synchronize subscribed folders "
That Microsoft error code often indicates a password issue so although this may sound odd the first thing to try is to reset your VM email password.
It may be that your VM password held by the VM servers has got out of step and a password reset should synchronise your password across all the VM servers. There could be other reasons for that error but a password reset won't hurt,
You can reset the password for your email account by signing into the "My Virgin Media" Account using your email address and password via this link https://my.virginmedia.com/home/signIn Then click on "Update settings" - then "Account details" and you will see the option to edit your password.
Alternatively, if you are having problems with the My Virgin Media Account route you can try resetting the password by entering the affected email address here https://www.virginmedia.com/my-virgin-media/forgotten-details/password and then following the prompts.
Once you have reset the password you will have to update the password held in the email settings on your phone and in Outlook manually. They will not be updated automatically.
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