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I recommend directly calling 1-800-426-9400, Monday through Friday, 6:00 A.M. to 6:00 P.M. (Pacific Time) to speak to a Microsoft licensing specialist and double confirm this issue.
The license terms point that
If none of the above apply, and you are also not an enterprise (defined below), then up to 5 of your individual users can use the software concurrently to develop and test your applications.
The license term mentions "up to 5 …", so it should also apply to the organization which includes more than 5 developers. However, the license term doesn’t indicate whether these 5 users can use VS Community to develop the apps in parallel with other developers using VS Professional edition. It’s recommended to double confirm with license specialist.
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