Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Dear H.Y.Chan,
To help the other community members who are experiencing the similar issues, I'd like to summarize the issue as follows.
The Search users connector will return the users at a maximum API call as 1000. So you can only get users' number at 1000 when using the connector by default. If you have more than 1000 users, you need to enable Pagination.
Office 365 Users - Connectors | Microsoft Learn
The max number of Pagination is 10,000.
Use lists of rows in flows - Power Automate | Microsoft Learn
If you want to reduce the number of the users, you can type the number in Top in the connection.
Hope that the information above helps.
If it is convenient, please also send your feedback as follows as it may benefit the community process.
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Welcome to post a new thread at your convenience on our forum if you encounter any issues in your environment.
Thanks for your time and effort.
Sincerely
Cliff | Microsoft Community Moderator