Microsoft doesnt approve adobe after effect as an authorized app to install.

As suggested by the expert, try installing using the Creative Cloud desktop app. If you still see the issue, try reaching out by phone or chat: https://helpx.adobe.com/contact.html

Note: Moving this thread from Bugs to Discussions.

Thanks,

Nishu

Are you installing it through Creative Cloud Desktop?

Does someone administer your computer and limit what can be installed?