Hello,
I have 2 tenants that have the same issue: they can't create environments with a Dataverse database even though they have sufficient capacity. Both are Commercial tenants.
Here is the capacity for the first one, 3.08 of 11.23 GB used. The second tenant has similar Dataverse capacity.

When I try to add a Dataverse database to an environment, I get "This operation is subject to capacity constraints".

When I click the link for "capacity constraints" I am forwarded to the "New Microsoft Dataverse storage capacity" page, supposedly updated on 9/1/2023, which states that only 1 GB of free Dataverse capacity is required to create an environment:

Of course this page is a bit unclear because it just says "Create a new environment" not "Create a new environment with a Dataverse database." So further research reveals the "Plan and manage license and capacity allocations" page which states clearly, and even highlights the paragraph, that "To create a database, there must be at least 1 GB of Dataverse database capacity remaining."

So WHY can't I create a new environment with a Dataverse database when I have more than enough capacity??? This is very frustrating! I opened a case with Microsoft support and it took them 3 weeks to write me back and then they closed the case before I got a chance to talk to anyone (it's truly frightening how bad Microsoft "support" has gotten).
Any ideas greatly appreciated! Anyone else have this problem? Again, I have this issue with two commercial tenants, so it's not a problem with GCC, GCC-High or DoD and it's not restricted to only one tenant.
Thanks,
Kathryn