The values stored in Parameter are static, if you want the changes made to data source to be synced with parameters the only way is to manually update the parameter. There is an idea in review for making Parameters dynamic. For additional information refer to this article. In your case, an alternative is to use the Manager name as a filter instead of Parameter to make it dynamic.
There's no real way to automatically update parameters as they are meant to be slightly static when built. That being said, there is an easy method to update them in which you edit the parameter and then select "Paste from Field" on the list. Select the dimension you wish to use to update and it should auto-populate the list for you. Please see the attached screenshot.
Please let me know if this helps answer your questions
Parameter will not get updated. We can manually change every time the data loads and republish to server.
Aspire Systems Pvt Ltd
Thanks ShivRam the article is really helpful .
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