Why: Your Organization's Data Cannot Be Pasted Here. – Outlook iOS
If you attempt to copy and paste from the Microsoft Outlook app on iOS to another app, the paste contents may always read “Your Organization's Data Cannot Be Pasted Here.”
This a protected feature in Microsoft Intune policy management. It is called restrict cut, copy and paste with other apps. This feature is controlled by your Intune administrator and is likely managed by a company policy installed on your device.
Blocked: Do not allow cut, copy, and paste actions between this app and any other app.
Policy managed apps: Allow cut, copy, and paste actions between this app and other policy-managed apps.
Policy managed with paste in: Allow cut or copy between this app and other policy-managed apps. Allow data from any app to be pasted into this app.
Any app: No restrictions for cut, copy, and paste to and from this app.
The only way around copy and paste in the Microsoft Outlook app is to take a screenshot of the media while in the Outlook app.