Understanding the new 100 GB mailbox entitlement for Microsoft 365 Business suites

Is the rollout for this complete? in my tenant, while new users created within the last year, have the 100GB, my older users do not yet have the 100 GB. The "additional 50 GB" shows up under their licenses, but they don't have it and if I try to provision thru powershell I get an out of scope error. I'm trying to figure out if I need to exercise more patience if they are still rolling this out with something that has to be done on the backend, or if something about my setup is preventing the provisioning to older accounts. I don't believe I have any custom quota limits in place. One thing of note is we sync AD one way from our server to Azure for users, but it is hard to find info on if this could be part of the problem?? We do not have a local exchange server it is exchange online. Our licenses are Business Standard.