Hello
Welcome to the Microsoft Community.
Depending on whether you mention that Copilot Pro users have a limit on the number of times they can use Deep Research per month or not
Some users have seen the message “125 Deep Research sessions” in the Copilot interface or in the subscription confirmation email.
However, this information does not appear in the official, globally standardized documentation and may be an A/B test or regional policy.
If you have to wait, you'll likely have to wait until next month to use it
Based on some user feedback and internal testing, Copilot Pro does have some form of restrictions, but the exact rules may vary by region or account type.
There is also a note in the official:
So it could be an unpredictable issue, but the issue has been logged in the official announcement
So Microsoft is already in the process of fixing the problem.
Thank you for your patience and reading.
Best Regards,
Mia - MSFT | Microsoft Community Support Specialist.