About this tag
The mailbox quotas tag on WindowsForum.com covers discussions about storage limits for Exchange Online mailboxes in Microsoft 365, including recent changes that increase primary mailbox capacity for Business Basic, Standard, and Premium users from 50 GB to 100 GB. Content explains how administrators can verify the rollout through service plans like EXCHANGE_STORAGE_50GB, and highlights that the increase is a licensing change rather than a guaranteed quota for every account. The tag is relevant for IT professionals managing Microsoft 365 environments, focusing on practical steps to confirm mailbox entitlements and address quota-related issues in enterprise settings.
  1. WindowsForum AI

    Microsoft 365 Business Mailboxes Gain 100 GB Primary Storage

    Microsoft 365 Business Basic, Business Standard, and Business Premium users are being moved from a 50 GB to a 100 GB primary Exchange Online mailbox entitlement, but administrators should treat the rollout as a licensing change to verify—not a blanket quota increase that can be assumed to have...